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Physics 101 Mechanics
May 2023
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Physics 101 Mechanics
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May 4, 2023
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May 4 of 2023
Consider a child on a tricycle accelerating from rest at a rate of 0.75( m)/(s^(2)) for a total of 9 s. Find the child's final velocity and final position.
A car that is parked at the top of a hill that is 300 meters, the mass of the car is 1,133 kg. What is the gravitational potential energy (PEgrav) of the car?
vA camper plans to canoe to an island. The island is 1500 meters south and 950 meters west of her starting point. To the nearest degree, in what direction should she head
A girl swings a 0.220 kg rock attached to a taut string in a circle around her head; her hand holds the end of the string above her head, and the string angles down slightly. The string is massless and 0.780 m long. A coordinate system lies with its origin at the location where the string comes…
Keenan has a bag of candy. Keenan gave 3/8 of the bag to Sue and 1/4 of the bag to Joe. Then Keenan gave 1/2 of the remaining bag to Mary. How much of the total bag of candy did Keenan give to Mary?
Two spheres have an attraction of 5,952 Newtons initially, but then you double the distance between them and make the charge of both spheres 5 times as small as they were initially. What is the new force of attraction between the particles? Include 4 decimals in your answer. Type your answer...
Glycerin has an index of refraction of 1.47. Find the focal length in glycerin of a lens made of flint glass (n=1.63) whose focal length is +10cm. 2. What is the focal length of a combination of two thin lenses in contact, both of whose focal lengths are +8 inches? Solve both. Thanks!
By differentiating Planck's law with respect to wavelength and finding the extreme value, Wien's displacement law can be derived. Show the process of proving Wien's displacement law.
A 29.0 nC point charge is at the center of a 3.00 m × 3.00 m × 3.00 m cube. What is the electric flux through the top surface of the cube? Express your answer in newton meters squared per coulomb.
A meniscus lens has a concave surface of radius 30 cm and a convex surface of radius 25 cm. The index of refraction of the glass is 1.50. A) Find the focal length of the lens. B) Is it a converging or diverging lens? 2. A planoconcave lens has a plane surface and one concave surface. If a…
A 3.0 kg cart moving at 4.0 m/s in the positive x direction collides with a second cart moving in the negative x direction at 1.0 m/s. After the collision, the first cart continues to move in the postive x direction at 1.0 m/s and the second cart also moves in the postive x direction at 2.0…
160g, 48.8 m/s, in contact for 0.05 s. How much force is experienced?
4. You are in a very large chamber floating in space. You shine a laser horizontally across the chamber, a distance of 3 km. How long does it take for the light to reach the other side? 5. The chamber in Problem 4 now accelerates upward at a rate of 200 m/s^2. How much is light vertically…
1. Two supernovae separated by 4,000 light years appear with one going off 3,000 years before the others. Are they causally connected (show your work)? 2. Repeat Problem 1 except they now go off 5,000 years apart. 3. NYC uses about 11 million kWh of energy per day. A potato has a mass of about…
We have a rectangular surface in space defined by points a = (0, 0, 0) cm; b = (1, 2, 3) cm; and c = (0, 2, 6) cm. Determine the magnetic flux through this surface produced by the magnetic field B = (2, 4, 0) N/C.
The volume of the cell nucleus is perhaps 10% of the cell it is part of. The nucleus of a cell is separated from the rest of the cell by a nuclear membrane that is about twice the thickness of the cell membrane. If the capacitance of the cell membrane is 6 pF, approximately what is the…
Which shows a number that is not equivalent to (-3)/(8)? (A) (3)/(-8) (B) (8)/(-3) (c) -0.375 (D) -(3)/(8)
A mass of 3 kg is moving with a velocity of 0.25 m/sec. An unbalanced force is applied and increases the velocity to 0.45 m/sec. The work done by the unbalanced force is_______J. Group of answer choices 0.34 0.21 1.2 0.24
As a general rule, mammalian cell membranes have a capacitance of about 1 mF per cm2 of surface area, which can be used to estimate the surface area of a cell. The membrane capacitance of one particular cell is found to be 2.5 pF. What is the approximate membrane area? A)2.5 um^2 B) 25 um^2 C)…
Special Theory of Relativity. Twin Paradox The case of the 21 year old twins. One twin travels to space for one year at a apeed of 0.998 c, then he comes back to earth, he is surprised when he meets with his twin brother, why? How old is his twin brother? (age of traveler, age of the twin who…
a. If the pressure in the closed container is initially 1.00 atmospheres in a volume V = 0.50 liters at a room temperature of 20 degrees Celsius, find the number of moles of air in the container. How many air molecules are in the container, and what is the mass of that air? (Take air as 80% N2…
The image of the point P(3,4) is , if P undergoes a translation (x,y)->(x-1,y+2).
A body is shot vertically and upwards with a velocity of 1,200 m/min. The mass of the body is 50 grams. What kinetic energy does it have when it is 5 meters above the ground?
Consider a long straight cylindrical wire of electrical conductivity σ and radius a carrying a uniform axial current of current density J. Calculate the magnitude and direction of the Poynting vector at the surface of the wire.
A model rocket is launched with an initial upward velocity of 30 m/s. The height of the rocket at any time t can be determined using the equation h = 30t - 5t^2.
A pendulum is made by tying a 550 g ball to a 46.0 cm -long string. The pendulum is pulled 25.0 ∘ to one side, then released.
Jack switches on the ceiling fan. If it takes 4.2s for the fan to reach its full angular speed of 360 RPM, starting from rest, how many revolutions will it rotate during the first 3s?
12. A 10 kg Burt is moving north at 2 m/s. He is headed toward a 4 kg Ernie heading west at 6 m/s. After the collision, the 10 kg Burt is heading south at 1 m/s. a) What is the initial momentum in the horizontal and vertical directions? 'b) What must be the final momentum in the horizontal and…
A magnet produces a 0.860 T field between its poles, directed to the east. A dust particle with charge q = -6.10 × 10^-18 C is moving straight down at 0.300 cm/s in this field. What is the magnitude of the magnetic force on the dust particle? _________N
the hypotenuse is 19 centimeters longer than each of it's legs
A 12 kg object is in a circular orbit around a 88 kg object at a distance of 9 meters. What is the magnitude of the tangential velocity in m/s of the 12-kg object in its orbit?
Vertex is (0,0) and opens to right with a focal width of 8
A 200 kg wagon is on a straight horizontal track. Calculate the work done in the following cases: a. We push with a force of 100 N without the cart moving. b. We push it with 200 N of force in the direction of the track and the cart moves 10 meters. c. We pull it from the side of the track,…
Venus is an "inner planet" (i.e. - closer to the Sun than Earth) and has a mass of 4.867x10^24 kg and a radius, r of 6,052 km. The average distance, d from Venus to the Sun is 108.2 x 10^6 km. The mass of the Sun, Ms = 1.99 x 10^30 kg. You must convert all linear measures to meters! (answers…
A jet plane travels around the world at 2000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in microsecond) be?
Question 14 Retaken A person skateboarding with a constant speed of 1.80 m/s releases a ball from a height of 1.30 m above the ground. Find the speed of the ball at time t = 0.200 s, in meters per second. Answer: 1.56 Question 16 Retaken A golf ball is given an initial speed of 52.0 m/s. What…
the bearing of A from B is 036. What is the bearing of B from A.
A wheel starts from rest at an angle of zero and has constant angular acceleration that rotates it to a counterclockwise angular speed of 99 rad/s when it reaches the angular position of 62 rad. How much time did this change in angular speed take?
In simple harmonic motion given by x left parenthesis t right parenthesis equals A space cos open parentheses omega t plus ϕ close parentheses, where is the speed the largest? a. x = 0 b. between 0 and +A c. between 0 and -A d. at either +A or -A
Solve for v: 24 - v = 2v. Simplify your answer as much as possible.
A small statuette sits at a distance of 8.4 cm from a converging lens with a focal length of 26.4 cm. Determine the magnification of the object's image.
A 3.89 cm tall object is placed 29.9 cm in front of the vertex of a concave spherical mirror with a radius of curvature of magnitude 18.2 cm. Determine the magnitude of the image height in cm.
A wire is 5.3 meters long. What is its length in centimeters?
A copper wire is wound in the form of a solenoid on a special steel core 5 cm in diameter and 20 cm long. If the coil has 550 turns and the magnetic permeability of iron is 7,000 Wb/Am, calculate the inductance of the coil. 2. Corrected_text: A 600-turn coil has a core 40 cm long and a…
At what angle (in degrees) is light inside crown glass (n = 1.52) completely polarized when reflected from water (nw = 1.33), as in a fish tank? i put 42.2 degrees and it was incorrect
Find the distance in nm between two slits that produces the first minimum for 410-nm violet light at an angle of 36.5°. i put 1030 nm and it was incorrect
A 1321-kg car climbs a 5.0° slope at a constant speed of 80.0 km/h. Assuming that air resistance may be neglected, at what rate (in kW) must the engine deliver energy to the drive wheels of the car? A) 38 kW B) 287 kW C) 25 kW D) 48 kW
Calculate the momentum of a truck with a mass of 6,120 kg moving at 2.75( m)/(s).
A crane with a 3000 kg counterweight and a 700 kg arm is capable of holding a 1200 kg load in equilibrium. Determine the position of the crane's pivot point as a function of the arm length, L.
Dilate ABC by a scale factor of 2 about the origin. A(3,2), B(0,2), C(0,3).
If the proper half-life of a muon is 2 microseconds, determine: a) Its half-life from the terrestrial system if it moves with a velocity of 0.99c. b) The distance it will travel, from the point of view of the Earth system, before disintegrating. c) The distance it will travel from the point of…
A rectangular loop (0.1 m x 0.3 m) of current is entering a uniform magnetic field (its motion is along its longer side) of magnitude B = 0.1 T into the page. The loop is traveling at 5 m/s and has a resistance of 5 Ohms. a. What is the induced current in the loop (magnitude and direction) when…
A rectangular loop (0.1 m x 0.3 m) of current is entering a uniform magnetic field (its motion is along its longer side) of magnitude B = 0.1 T into the page. The loop is traveling at 5 m/s and has a resistance of 5 Ohms. 1. What would be the effect on the induced EMF and time over which the…
Saturn's largest moon, Titan, is far from the Sun, but it has a weak gravitational field. If it could hold onto only one of the following compounds in its atmosphere, which would you expect? molecular hydrogen (H2) methane (CH4)
Which of the two would you expect to retain large amounts of molecular hydrogen? *Jupiter * Mercury
As part of a circus act, two trapeze artists perform a stunt using a pneumatic cannon. The first trapeze artist climbs a tall pole and then falls onto a spring-action bellows, which pressurizes the cannon. When the pressure in the cannon reaches a certain value, the second trapeze artist is…
A 28.0 kg solid cylinder is rolling without slipping across a horizontal surface at a speed of 6.4 m/s. How much work (in J) is required to stop it?
A baseball is batted at 43.81 m/s and caught by an outfielder. Suddenly, the outfielder gets hit by a car at 53.64 m/s. The person was not moving when the car hit them. What is the final velocity of the car and person as they are stuck together? Mass of Car (M_car) = 1000 kg Mass of Person…
Consider the uniform drawbridge with a mass of 55 kg and a length of 8.50 cm. The drawbridge is held stationary by a rope that attaches 1.2 cm from the end of the bridge. The rope makes an angle of 70 degrees with the vertical. Calculate the tension in the rope. (DON'T forget the force exerted…
You are on a boat and looking down and see a starfish at the bottom is what you see bigger or smaller than what the actual size of the star fish is? What phenomena is this? Why is this?
In terms of a loop of current, why is a North pole inseparable from a South pole? The positive current in a loop creates a negative current, and vice versa. These currents are the two poles. There is no relationship between current loops and North and South poles. The current loop creates an…
What is the reactance of a 2.60 μF capacitor at a frequency of 50.0 Hz ? What is the reactance of a 2.60 μF capacitor at a frequency of 1.30 MHz ?
Can someone please write out step by step the algebra for "connecting the gravitational potential energy with the result near the surface of the earth"? i.e. the relationship between U = mgh and U = -G(mM_E/R_E + h)
Particle A and B are identical charged particles, traveling a the same speed. Compare the force experienced by particle A (FA) to the force experienced by particle B (FB) when they each enter the magnetic field shown. Particle A enters perpendicular to the magnetic field. Particle B enters at…
Particle A and B are identical charged particles, traveling a the same speed. Compare the force experienced by particle A (FA) to the force experienced by particle B (FB) when they each enter an electric field. Particle A enters perpendicular to the electric field. Particle B enters at 65…
Object distance = 14.0 cm Image distance = 33.0 cm Use these two distances and the thin-lens formula to determine the focal length f of the lens and calculate the percent error between the calculated focal length and the specification 100 mm. Show your math.
A spring under a compression of x has a potential energy Vâ‚€. When the compression is doubled to 2x, the potential energy stored in the spring is 4Vâ‚€.
If you chose to apply a Holmes test during an investigation, in which stage of the PPDAC model would that be most appropriate to describe? Group of answer choices Problem Analysis Data Conclusion Plan
50=(9)/(5)40+32 and 40=(5)/(9)(50-32). Which temperature, 40 degrees Celsius or 50 degrees Fahrenheit, is warmer?
Is the following collision physically possible? Why/why not? A billiard ball (A) with velocity + 20 m/s strikes an identical ball (B) that is initially at rest. At the end of the collision, ball A is at rest and ball B has velocity +18 m/s.
A grumpy person shoots a speargun vertically up towards the hot air balloon from 1). If the spear leaves the gun at 30.0 m/s, can it hit the balloon? You may ignore drag.
(a) Does the upward force on an object in a fluid depend on the density of the fluid? (b) Find the equation for the force exerted by a fluid on an object submerged in it. (c) Find the formula for the buoyant force on an object in a fluid.
During an exercise, Maverick takes out an enemy and then turns to fly back to base, which is to his West. After travelling for 20 minutes, a new contact appears behind Maverick and he turns around to deal with it. It takes him 8.0 minutes to reach the new contact. If the distance between the…
5) Given that the speed of light in a vacuum is 299,792,458 m/s, and the speed limit on M1 is 110 km/h, calculate the ratio of the speed of light to the speed limit on M1.
if a cylinder has a mass of 50g, a radius of 1cm and a height of 3cm, what is its density?
Alien game Planet game Rocket game Moon game (16)/(50) 0.06 (12)/(25) 43%
A sound wave in the air has a frequency of 277 Hz and travels with a speed of 349 m/s. How far apart are the wave crests (compressions)?
A metal having density = 5,000 kg/m^3 and mass = M = 60,000 kg sank long ago into the sea. The density of the seawater is 1,000 kg/m^3. 1) The submerged volume of the metal is V = ___ m^3. 2) The buoyant force (BF) exerted by the water on the metal is BF = ____ N. 3) The tension force required…
Find the induced emf for a 18 cm diameter loop of wire in a 4.8 T magnetic field if it is parallel to the field and then is turned so that it is perpendicular to the field in 1.73 seconds. Give the answer in V, to the third decimal place.
write a rule for g translation of 2 units down reflection in y axis
A pilot goes into a steep descent. Their altitude reduces from 1200 ft to 900 ft. If their initial speed was 130 knots and the effect of drag was negligible during the maneuver, what is their final kinetic energy? The mass of their plane is 900 kg. Give your answer in base SI units.
a square meter is how many times as large as a square nanometer
2) A glider of mass 300 kg is in level flight at a speed of 80 knots. It collides with a freakishly big flying fox (a type of bat) of mass 30 kg that is flying in the same direction at 10 m/s. The bat becomes stuck to the fuselage. (i) Is this an elastic or totally inelastic collision? (i)…
Topic 6 Practice: Sketch the solution to each system of inequalities.
A coil has 190 turns enclosing an area of 13.0 cm^2. In a physics laboratory experiment, the coil is rotated during the time interval 0.042 s from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the…
Explain in detail how you will determine the equivalent resistance for the resistors connected in parallel
If the voltage across the power supply, V = 3V, and the total circuit current, I = 133.5 mA for a parallel circuit with resistors R1 = 56 Ω, R2 = 39 Ω, and R3 = 82 Ω, calculate the equivalent resistance for the three resistors connected in parallel.
A 2.00 kg frictionless block is attached to an ideal spring with a spring constant of 300 N/m on a horizontal frictionless surface. At t = 0, the block has a velocity of -4.00 m/s and a displacement of +0.200 m away from equilibrium. Find the maximum velocity of the block
I need help! I used a Campbell (1/4, G43, 2600 lb, 701). I measured it in air with my spring scale and it is 0 lb 5 oz. In water, it measured 0 lb 4 oz. I need to put these measurements in newtons. I hope I did that correctly, if not please correct me on that: [(air) 5 oz = 1.390068442 N ~…
The mass and charge of a water droplet are 1.9 × 10^(-4) g and 1.8 × 10^(-8) C, respectively. If the droplet is given an initial horizontal velocity of 5.5 × 10^5 î m/s, what magnetic field (in T) will keep it moving in this direction? (Assume the magnetic field is perpendicular to the…
If the constant velocity is 4 m/s and time is 5 seconds the displacement is? Choose one.
Find the induced emf for a 12 cm diameter loop of wire in a 2.3 T magnetic field if it is parallel to the field and then is turned so that it is perpendicular to the field in 1.27 seconds.
Can you please give a brief description/definition of each: 1. Causes of electromagnetic induction 2. Relationships between the number of turns, voltage, and current in the two types of transformers 3. Right-hand rule for a charge moving in a magnetic field 4. Earth's magnetic field 5.…
What would your weight be if you were able to travel to the center of the earth? Aren't you surrounded by mass in the center of the earth?
Can you please give an example of each concept and solve the example you give? Please and Thank you! 1. Problem involving torque on a current loop placed in a magnetic field 2. Finding current induced in a loop when it is placed in a magnetic field and the resistance in the circuit is…
OBSERVATION: A shiny red rock is sitting at the bottom of a swimming pool. You grab a long stick and poke it into the pool aiming for the rock, but the stick overshot the rock by a lot. ANSWER GUIDE: Use concepts from L3 and L4 to explain two aspects of this observation: (1) Why was the rock in…
OBSERVATION: A box with a pinhole is pictured below. (No lens, just a tiny hole.) We see a tree outside of the box and an upside-down image of the tree inside the box. ANSWER GUIDE: Use concepts from L1 and L2 to explain how the tree, which is not a light source, is sending light into the box…
A bottle of Chanel No. 5 perfume is 6 inches high and is placed 8 inches in front of a mirror whose focal length is -15 inches. Find the LSN of the image.
You are provided with a rectangular glass prism, styrofoam platform, paper, and four pins. Describe in detail how you would determine the refractive index of the glass prism experimentally.
An electrical resistance of 147 Ω is connected to a current source supplying 8 A. Determine the energy in Joule dissipated by the resistor in a time of 9 s.
We can explain the recoil that occurs when a rifle is fired by using O Any of the above. O equal and opposite impulses. conservation of momentum. O equal and opposite changes in momentum
Inside a massive star three Helium atoms (4.002602 u) can fuse into one carbon atom (12.000000 u). How much energy, in Joules, is released in this reaction? a) 1.1662 x 10-12 J b) 7.025 x 10-14 J c) 7.806 x 10-3 J d) 3.887 x 10-21 J
A series RLC circuit consists of a 65 Ω resistor, a 0.16 H inductor, and a 35 μF capacitor. It is attached to a 120 V /60 Hz power line what is the average power loss?
Answer the following questions: 1. Longer focal lengths correspond to optical devices which are a) fatter b) more curved and a) stronger b) weaker 2. Nearsighted people a) form images in front of their retinas b) behind their retinas …
A certain person is wearing eyeglasses of strength -3.0 D. What is this person's uncorrected near point? Use two significant digits. 2. A magnifier has a magnification of 5x. Using this magnifier held right up against the eye, what is the closest distance one can get to an object and still be…
A solenoid of diameter 14.1 cm and 198 turns of wire is connected to a battery. A 0.24 A current is pasing thorugh the solenoid. How much magnetic field will be induced at the center of the solenoid? Express your answer in mili Tesla show all work
A plastic army man, 6 cm long, is placed 30 cm in front of a concave mirror whose focal length is 50 cm. Find the location, size, and nature (LSN) of the image.
A 2.00 kg frictionless block is attached to an ideal spring with a spring constant of 300 N/m on a horizontal frictionless surface. At t = 0, the block has a velocity of -4.00 m/s and a displacement of +0.200 m away from equilibrium. Find a. the amplitude of the motion b. the period of the…
an airplane heading due east at 215 km/h is blown of course by a strong wind og 65 km/h blowing 45 degrees south of west
A transverse wave on a string is given by the wave function y(x, t) = (0.450 m) sin (31.4 rad/s)t - (3.14 m^(-1))x + 𜑠where 𜑠= ðœ‹/4. (a) What are the speed and acceleration of a point on the string that is at x = 0 m and t = 0.350 s? (Indicate the direction with the sign of your…
In an AC capacitor circuit, the current peaks before the voltage. A) at the same time as B) after C) before 0.5 the voltage. 2. Corrected_text: In an RLC circuit, Kirchhoff's loop rule can only be used with instantaneous values. A) instantaneous values B) amplitudes C) rms values 3.…
Consider a process that uses n = 40.5 moles of a monatomic ideal gas operating through the Carnot cycle shown on the right. The initial temperature and pressure of the gas are T1 = 325 K and P1 = 3.42 × 105 Pa respectively. Consider steps 1 → 2, 2 → 3, 3 → 4, and 4 → 1.
A superconducting ring with a radius of 1 mm and a radius of the wire r0 = 0.1 mm is being used to determine the persistence of the current. (a) Estimate the current in the superconductor if the magnetic field at the center of the ring is measured to be 1 mT. (b) What is the magnetic field…
Body of Water Number Rivers 2^(2)*5^(4)*10^(2) Lakes 2^(3)*5^(6) How many more rivers are there than lakes?
A square playground has an area of 10,000 ft². What is the side length of the playground? Show your work.
Places like Las Vegas where everywhere you go you smell smoke or some kind of tobacco product
2>(9)/(4) To draw a ray, plot an endpoint and select an arrow. Select an endpoint to change it fron closed to open. Select the middie of the ray to delete it.
Having some trouble getting this question right, just need some help solving it. Will upvote if correct. A 12.8 kg object is dropped from a height of 5.000 km. It has a drag coefficient of 0.985 and a cross-sectional area of 1.15 m^2. The air density is 1.20 kg/m^3. Determine the terminal…
r + 3 ≤ -1 To draw a ray, plot an endpoint and select an arrow. Select an endpoint to change it from closed to open. Select the middle of the ray to delete it.
A 55-kg woman in an elevator is accelerating downward at a rate of 1.4 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman's feet?
In a double-slit interference pattern, the 7th maximum from the central maximum corresponds to which value of m? A laser beam is shown through a grating, and a first-order maximum is produced at an angle of 9°. At what angle is the third-order maximum produced? In a single-slit experiment,…
An electrical resistance of 102 Ω is connected to a current source supplying 5 A. Determine the energy in Joule dissipated by the resistor in a time of 8 s.
A 105 Ω electrical resistor is connected to a current source supplying 7 A. Determine the energy in Joule dissipated by the resistor in a time of 17 s.
An electrical resistance of 189 Ω is connected to a current source supplying 3 A. Determine the energy in Joule dissipated by the resistor in a time of 6 s.
The location of the "dark fringes" in a single-slit diffraction experiment are given by aâ‹…sin𜃠= mðœ†, where m = "0, +1, -1, +2, -2....". The same formula with m replaced by (m + 1/2), gives the "approximate location of the bright" fringes (other than the central maximum), where m = "0,…
A large balloon used to sample the upper atmosphere is filled with 665 m3 of hydrogen. What is the mass of the hydrogen (in kg)? kg
A rectangular wire 8 cm high and 4 cm wide lies in the x-z plane and carries current I. (a) What is the magnetic moment m? (b) Place this loop in a magnetic field B = 50 mT√2 (ˆx + ˆy) and find the torque about the z-axis.
Consider a 2 cm flat strip, carrying 15 A of current in the ˆx direction. What is the force dF = I(dl × B) on the strip, per unit length, if placed in a field of B = 0.2 ˆy Tesla?
A unicorn running on a beach at 6 m/s changes speed at a constant rate of 2.5 m/s2 over a period of 1 seconds. What distance did the unicorn travel during this process?
Margie, who weighs 537 N, is standing on a bathroom scale that weighs 40.0 N. With what magnitude force does the scale push up on Margie? With what magnitude force does the floor push up on the scale?
(a) If the distance between two masses is quadrupled, how does the force of gravity change? (b) If the distance between two masses is one-third the original distance, what is the relationship between the new gravitational force and the original gravitational force? (c) On the stairway you raise…
An 80kg person steps on a bathroom scale that rests on the surface on an elevator. a) If the elevator is at rest what is the scale force reading? b) If the elevator accelerates upward at 3 m/s2, what is the scale force reading? c) If the elevator accelerates downward at 3 m/s2, what is the…
A uniform beam of mass M and length L is connected to a vertical wall by a hinge. The beam is exactly horizontal and is supported by a wire that is attached to the end of the beam and connected to the ceiling above. The angle between the wire and the beam is θ. (a) Find the tension in the wire…
A cart of mass m moving to the right with a velocity v collides with a cart of mass 3m moving to the left with a velocity of -v. The two carts stick together after the collision. What are the final velocities of the two carts?
The speed of light through a transparent substance is 2.00 x108 m/s. What is the refractive index of the substance?
A 2.00 kg object is pulled along a rough horizontal surface, mk = 0.20, by a 10.0 N force acting at an angle of 40° with the horizontal. Using the above information, the acceleration of the 2.00 kg object is closest to (A) 1.85 m/s2. (B) 2.50 m/s2. (C) 2.75 m/s2. (D) 3.80 m/s2.
What is the mass of water in the beaker (make sure it is just the water)? Explain how you found your answer. Pivot Interact Lab 9
A man pulls a 10-kg sled 50 meters along an angled hill with a force of 500 N, which elevates the man 30 meters above the bottom of the hill. The man then hops on his sled and slides from rest to the bottom of the hill back along his 50 meter path, during which a 300 N frictional force acts…
A 0.35 kg object moves horizontally to the right and a speed of 2.3 m/s. It collides with a 0.23 kg object that is at rest. After the collision, they stick together. What is their speed after the collision?
A converging lens has focal length 12 cm. If I place an object at a distance 48 cm, what is the image distance? Tries 0/5 If I place an object at a distance 48 cm, what is the magnification? Tries 0/5 If I place an object at a distance 14.4 cm, what is the image distance? Tries 0/5 If I place…
If you were given a wavelength of λ = 600 nm and knew that the width of the two slits were d = 0.4 mm, and you were to measure a distance of t = 1 m between the slits and the screen on which the light is projected, determine the distance between the central peak of your diffraction pattern and…
A light source is embedded in a crystal with an unknown index of refraction. Light which originates inside the crystal and reaches the crystal-air interface with an angle of incidence greater than 30 degrees is totally internally reflected. What is the angle of refracted light when light is…
What is the overall temperature change of the water during the time it is being heated by the light bulb? Explain how you found your answer. physics lab 9
High-frequency traders in Chicago rely on networks that communicate financial data from New York over a one-way distance of 825 miles. If the round trip for the data through a high-speed fiber optic cable takes 13.5 milliseconds, what is the speed of light through the cable? Tries 0/5 What is…
1. If a 15 ohm and a 20. ohm pair of resistors are connected in series, what single resistor can be used so as to get the same current flow as the two in series?
There are two objects separated by a 100.0 cm distance. One on the left has a mass of 45 kg, and the other one on the right has a mass of 9 kg. Calculate the center of mass point of the system from the left object.
If you lift the child of mass 20.0 kg by bending your elbow joint, calculate the torque you created on the elbow. Take the distance from your hand to elbow as 0.9 m.
A person does 7.00×10^6 J of useful work in 8.30 h. Working at this rate, how long will it take this person to lift 2.00×10^3 kg of bricks 1.70 m to a platform? To solve this problem, it will be necessary to first find the average useful power output of the person. What is the average useful…
An archer notches an arrow of mass 29.0 g and draws back on the bowstring, exerting an average force of 283 N over a distance of 46.0 cm. What is the speed of the arrow after it is released? (Assume there is negligible energy lost to sound or vibrations.)
Assume that the Milky Way Galaxy's main disk is 1000 LY thick and has a diameter of 100,000 LY.Part (a) What is the volume of the main disk of the Milky Way Galaxy in cubic light-years? Volume = |LY3Part (b) What is the number density of stars in the disk, assuming that the disk contains 300…
A 88.0 g toy car is propelled by a compressed spring that starts it moving. The car follows the curved track as shown below. Find the final speed of the toy car if its initial speed is 2.14 m/s and it coasts up the frictionless slope, gaining 0.140 m in altitude. Find the final speed of the…
Use the focal length 10.0 cm and the thin lens equation, calculate the necessary object distance to get a magnification of Mo = – 5. That is di = 5do. Show your math. What are the object distance and image distance?
Our solar system is 4.6 billion years old. Based on the age of the solar system, how many galactic years has planet Earth been around? (Use 2.25 × 10^8 years as the length of one galactic year.) Time = |galactic years
What is the smallest equivalent resistance when three resistors (1.32 Ω, 3.42 Ω, and 3.74 Ω) are connected together?
A carbon rod with a radius of 0.3 mm is used to make a resistor. What length of the carbon rod should be used to make a 2.5 Ω resistor? The resistivity of this material is 9.7 × 10^(-5) Ω · m. Answer in units of mm.
You are throwing a basketball and the ball takes the path of a projectile. Assuming negligible air resistance, what can you say about the horizontal and vertical components of the velocities along the path of the projectile?
The emf of a battery is E = 17 V . When the battery delivers a current of 0.7 A to a load, the potential difference between the terminals of the battery is 15 V volts. Find the internal resistance of the battery. Answer in units of Ω.
The force of gravity between two planets is 8.0 x 1020 N. If the mass of one planet is somehow doubled, Calculatethe force of gravity now?
A length of wire is cut into 8 equal pieces. The 8 pieces are then connected parallel, with the resulting resistance being 3 Ω. What was the resistance r of the original length of wire? Answer in units of Ω.
What is the gravitational potential energy relative to the generators of a lake of volume 47.0 km³ (mass = 4.70×10^13 kg), given that the lake has an average height of 40.0 m above the generators? Compare this with the energy stored in a 9-megaton fusion bomb, 3.50×10^16 J. The gravitational…
A spring extends 145 cm when a 1.0 kg load is suspended from it. What would be the extended length if a 2.0 kg load were suspended from it?
How much energy is needed to convert 9kg of ice at zero degree into 80 °C water? Specific heat of water is 4186 J/kg C, specific heat of ice is 2090 J/kg C and latent heat of ice is 3.33 x10 J/kg
which of the following has the greatest difference between the first and the second ionisation energy
Calculate the force needed to bring a 857 kg car to rest from a speed of 90.0 km/h under the following circumstances. (Define the positive direction to be the direction of the velocity.) Calculate the force needed to bring the car to rest in a distance of 133 m (a fairly typical distance for…
A nurse injects liquid medicine into your body by exerting a 2.0 N force onto a hypodermic syringe. If the barrel of the syringe is 7.85 x 10^5 m² and the syringe's needle is 2.55 x 10^-8 m² in cross-sectional area, how many newtons of force does the medicine come out from the needle into…
A material is known to consist entirely of an isotope of calcium, although the particular isotope is not known. From such limited information, which of the following quantities can you specify for the isotope?
system does 100 J of work to its surroundings and gains 50 J of heat in the process. Calculate the change in the internal energy of the system. Determine if the internal energy is increased or decreased during the process.
How fast must a 3.31×10^3 kg elephant move to have the same kinetic energy as a 68.0 kg sprinter running at 9.00 m/s? To solve this problem, it will be necessary to first determine the kinetic energy of the sprinter. What is the kinetic energy of the sprinter? How fast must the elephant move…
A physical pendulum is composed of a thin, homogeneous square plate with mass M and side L. The plate has a small hole near one of the vertices so that it can oscillate freely around an axis passing through the hole (perpendicular to the plane of the plate) under the action of a uniform…
What is the position of the point plotted in polar coordinates?
Suppose you have a device that uses 15 A of current at 120 V AC. How much current would you need on a 7200 V incoming power line? How much on a 50,000 V high power line?
A 0.50-kg block is initially dropped from a height h above a spring with a spring constant of k = 800 N/m. The block falls onto the spring and compresses it a distance of d = 10 cm before coming to a stop. From what height h above the spring was the block released from initially? Please…
Consider the atoms C-12, C-14 and N-14 from greatest to least rank them by the number of (a) protons in the nucleus, (b) neutrons in the nucleus, (c) nucleons in the nucleus.
If two objects (A & B) travel from X to Y at a constant speed of 50 km/h ? Choose one.
(v-3)/(v^2-6v+9) If there is more than one value, separate them with commas
ten more than thrice a number is at most twice another number
a. A ballistic pendulum used to measure the velocity of a bullet is constructed by suspending a wooden block of mass M from an inextensible cord of length b in the gravitational field g. The pendulum is initially at rest in the vertical position. A bullet of mass m is fired into the block and…
Knowing that Millikan’s experiment gives a value of 1.609 x 10-19 coulombs for the charge on an electron, calculate the mass of the electron from your experimental value of e/m. Compare the results to the accepted value of 9.1099 x 10-31 kg by using % error.
Which measurement is closest to the volume of the sphere in cubic meters?
find the speed of an electron whose kinetic energy is 500 eV in scientific notation.
(b) Work out the length of KL. Give your answer correct to 3 sig
If A=(-2,-4) and B=(-8,4), what is the length of bar (AB) ? A. 14 units B. 16 units C. 12 units D. 10 units
If an earthquake has an intensity of 61000 times l_(0), what is the magnitude of the earthquake?
r in the box provided. No math from there until all 15 are con 47x+11
Simplify the following expression, leaving your answer in exponent form. (7^(9))^(3)
Solve the equation. Drag each SC. If the polynomial has a repeated x^2 - 4x + 40 = 0.
Average velocity can be used to calculate the distance traveled even if the velocity changes over the time involved
Earthquake was 10^(7.33)*1. What was the magnitude on the Richter scale?
if the magnitude of a vector is 10, and the direction is 60, what is the vector
Suppose you were told that someone had a hearing loss of 20 dB at 125 Hz, and that the normal threshold of hearing was 633 uPa at that frequency. a) What is the normal threshold of hearing at 125 Hz in dBSPL? b) What sound pressure (in uPa) would be the least intense that person could hear at…
Suppose you were told that someone had a hearing loss of 20 dB at 125 Hz, and that the normal threshold of hearing was 633 Pa at that frequency. a) What is the normal threshold of hearing at 125 Hz in dB SPL? b) What sound pressure (in Pa) would be the least intense that person could hear at…
Light of frequency 12E14 Hz is incident on a plate of zinc (work function of zinc = 6.63E-19 J), which causes electrons to be ejected from the zinc. What is the maximum velocity that the ejected electrons can have?
Take a pure sound propagating in air at 20°C, whose wavelength is 3.43 m. A second pure sound of the same wavelength is delayed by 2.5 ms relative to the first. What is the phase difference in degrees between the two sounds?
Two rugby players are pushing on either side of a tackle sled. Player A is pushing down and to the right with 275N of force at an angle of 13 degrees above the horizontal. Player B is pushing to the left with a force of 98N in line with the horizontal. What is the net work done if the sled is…
Calculate the water pressure at the bottom of a 40-m-high water tower.
In a circle of radius 11cm, the length of the arc subtended by a central angle of 0.6 radians is:
a circular flower bed is 20m in diameter and h as a circular sidewalk around it that is 2m wide
6. A freely floating astronaut is stranded in space. In order to move she must blast compressed air. If her mass is 60 kg and there is 0.10 kg of compressed air in her tank that can shoot out at 40 m/s, with what speed can the astronaut move? a. 2400 m/s b. 40 m/s C. 4 m/s d. 66.667 m/S e.…
a) Why can't one hear the sound of an alarm clock if it is placed in a vacuum? b) If the frequency of a sound wave is doubled, how much does its wavelength change? How much does its speed change? c) Consider a pure sound propagating in air at 20°C, with a wavelength of 3.43 m. A second…
find the distance in centimeters of a 851.61 volts electric potential from a 7.58 nc point charge
Consider a child on a tricycle accelerating from rest at a rate of 0.75( m)/(s^(2)) for a total of 9 s. Find the child's final velocity and final position.
A car that is parked at the top of a hill that is 300 meters, the mass of the car is 1,133 kg. What is the gravitational potential energy (PEgrav) of the car?
vA camper plans to canoe to an island. The island is 1500 meters south and 950 meters west of her starting point. To the nearest degree, in what direction should she head
A girl swings a 0.220 kg rock attached to a taut string in a circle around her head; her hand holds the end of the string above her head, and the string angles down slightly. The string is massless and 0.780 m long. A coordinate system lies with its origin at the location where the string comes…
Keenan has a bag of candy. Keenan gave 3/8 of the bag to Sue and 1/4 of the bag to Joe. Then Keenan gave 1/2 of the remaining bag to Mary. How much of the total bag of candy did Keenan give to Mary?
Two spheres have an attraction of 5,952 Newtons initially, but then you double the distance between them and make the charge of both spheres 5 times as small as they were initially. What is the new force of attraction between the particles? Include 4 decimals in your answer. Type your answer...
Glycerin has an index of refraction of 1.47. Find the focal length in glycerin of a lens made of flint glass (n=1.63) whose focal length is +10cm. 2. What is the focal length of a combination of two thin lenses in contact, both of whose focal lengths are +8 inches? Solve both. Thanks!
By differentiating Planck's law with respect to wavelength and finding the extreme value, Wien's displacement law can be derived. Show the process of proving Wien's displacement law.
A 29.0 nC point charge is at the center of a 3.00 m × 3.00 m × 3.00 m cube. What is the electric flux through the top surface of the cube? Express your answer in newton meters squared per coulomb.
A meniscus lens has a concave surface of radius 30 cm and a convex surface of radius 25 cm. The index of refraction of the glass is 1.50. A) Find the focal length of the lens. B) Is it a converging or diverging lens? 2. A planoconcave lens has a plane surface and one concave surface. If a…
A 3.0 kg cart moving at 4.0 m/s in the positive x direction collides with a second cart moving in the negative x direction at 1.0 m/s. After the collision, the first cart continues to move in the postive x direction at 1.0 m/s and the second cart also moves in the postive x direction at 2.0…
160g, 48.8 m/s, in contact for 0.05 s. How much force is experienced?
4. You are in a very large chamber floating in space. You shine a laser horizontally across the chamber, a distance of 3 km. How long does it take for the light to reach the other side? 5. The chamber in Problem 4 now accelerates upward at a rate of 200 m/s^2. How much is light vertically…
1. Two supernovae separated by 4,000 light years appear with one going off 3,000 years before the others. Are they causally connected (show your work)? 2. Repeat Problem 1 except they now go off 5,000 years apart. 3. NYC uses about 11 million kWh of energy per day. A potato has a mass of about…
We have a rectangular surface in space defined by points a = (0, 0, 0) cm; b = (1, 2, 3) cm; and c = (0, 2, 6) cm. Determine the magnetic flux through this surface produced by the magnetic field B = (2, 4, 0) N/C.
The volume of the cell nucleus is perhaps 10% of the cell it is part of. The nucleus of a cell is separated from the rest of the cell by a nuclear membrane that is about twice the thickness of the cell membrane. If the capacitance of the cell membrane is 6 pF, approximately what is the…
Which shows a number that is not equivalent to (-3)/(8)? (A) (3)/(-8) (B) (8)/(-3) (c) -0.375 (D) -(3)/(8)
A mass of 3 kg is moving with a velocity of 0.25 m/sec. An unbalanced force is applied and increases the velocity to 0.45 m/sec. The work done by the unbalanced force is_______J. Group of answer choices 0.34 0.21 1.2 0.24
As a general rule, mammalian cell membranes have a capacitance of about 1 mF per cm2 of surface area, which can be used to estimate the surface area of a cell. The membrane capacitance of one particular cell is found to be 2.5 pF. What is the approximate membrane area? A)2.5 um^2 B) 25 um^2 C)…
Special Theory of Relativity. Twin Paradox The case of the 21 year old twins. One twin travels to space for one year at a apeed of 0.998 c, then he comes back to earth, he is surprised when he meets with his twin brother, why? How old is his twin brother? (age of traveler, age of the twin who…
a. If the pressure in the closed container is initially 1.00 atmospheres in a volume V = 0.50 liters at a room temperature of 20 degrees Celsius, find the number of moles of air in the container. How many air molecules are in the container, and what is the mass of that air? (Take air as 80% N2…
The image of the point P(3,4) is , if P undergoes a translation (x,y)->(x-1,y+2).
A body is shot vertically and upwards with a velocity of 1,200 m/min. The mass of the body is 50 grams. What kinetic energy does it have when it is 5 meters above the ground?
Consider a long straight cylindrical wire of electrical conductivity σ and radius a carrying a uniform axial current of current density J. Calculate the magnitude and direction of the Poynting vector at the surface of the wire.
A model rocket is launched with an initial upward velocity of 30 m/s. The height of the rocket at any time t can be determined using the equation h = 30t - 5t^2.
A pendulum is made by tying a 550 g ball to a 46.0 cm -long string. The pendulum is pulled 25.0 ∘ to one side, then released.
Jack switches on the ceiling fan. If it takes 4.2s for the fan to reach its full angular speed of 360 RPM, starting from rest, how many revolutions will it rotate during the first 3s?
12. A 10 kg Burt is moving north at 2 m/s. He is headed toward a 4 kg Ernie heading west at 6 m/s. After the collision, the 10 kg Burt is heading south at 1 m/s. a) What is the initial momentum in the horizontal and vertical directions? 'b) What must be the final momentum in the horizontal and…
A magnet produces a 0.860 T field between its poles, directed to the east. A dust particle with charge q = -6.10 × 10^-18 C is moving straight down at 0.300 cm/s in this field. What is the magnitude of the magnetic force on the dust particle? _________N
the hypotenuse is 19 centimeters longer than each of it's legs
A 12 kg object is in a circular orbit around a 88 kg object at a distance of 9 meters. What is the magnitude of the tangential velocity in m/s of the 12-kg object in its orbit?
Vertex is (0,0) and opens to right with a focal width of 8
A 200 kg wagon is on a straight horizontal track. Calculate the work done in the following cases: a. We push with a force of 100 N without the cart moving. b. We push it with 200 N of force in the direction of the track and the cart moves 10 meters. c. We pull it from the side of the track,…
Venus is an "inner planet" (i.e. - closer to the Sun than Earth) and has a mass of 4.867x10^24 kg and a radius, r of 6,052 km. The average distance, d from Venus to the Sun is 108.2 x 10^6 km. The mass of the Sun, Ms = 1.99 x 10^30 kg. You must convert all linear measures to meters! (answers…
A jet plane travels around the world at 2000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in microsecond) be?
Question 14 Retaken A person skateboarding with a constant speed of 1.80 m/s releases a ball from a height of 1.30 m above the ground. Find the speed of the ball at time t = 0.200 s, in meters per second. Answer: 1.56 Question 16 Retaken A golf ball is given an initial speed of 52.0 m/s. What…
the bearing of A from B is 036. What is the bearing of B from A.
A wheel starts from rest at an angle of zero and has constant angular acceleration that rotates it to a counterclockwise angular speed of 99 rad/s when it reaches the angular position of 62 rad. How much time did this change in angular speed take?
In simple harmonic motion given by x left parenthesis t right parenthesis equals A space cos open parentheses omega t plus ϕ close parentheses, where is the speed the largest? a. x = 0 b. between 0 and +A c. between 0 and -A d. at either +A or -A
Solve for v: 24 - v = 2v. Simplify your answer as much as possible.
A small statuette sits at a distance of 8.4 cm from a converging lens with a focal length of 26.4 cm. Determine the magnification of the object's image.
A 3.89 cm tall object is placed 29.9 cm in front of the vertex of a concave spherical mirror with a radius of curvature of magnitude 18.2 cm. Determine the magnitude of the image height in cm.
A wire is 5.3 meters long. What is its length in centimeters?
A copper wire is wound in the form of a solenoid on a special steel core 5 cm in diameter and 20 cm long. If the coil has 550 turns and the magnetic permeability of iron is 7,000 Wb/Am, calculate the inductance of the coil. 2. Corrected_text: A 600-turn coil has a core 40 cm long and a…
At what angle (in degrees) is light inside crown glass (n = 1.52) completely polarized when reflected from water (nw = 1.33), as in a fish tank? i put 42.2 degrees and it was incorrect
Find the distance in nm between two slits that produces the first minimum for 410-nm violet light at an angle of 36.5°. i put 1030 nm and it was incorrect
A 1321-kg car climbs a 5.0° slope at a constant speed of 80.0 km/h. Assuming that air resistance may be neglected, at what rate (in kW) must the engine deliver energy to the drive wheels of the car? A) 38 kW B) 287 kW C) 25 kW D) 48 kW
Calculate the momentum of a truck with a mass of 6,120 kg moving at 2.75( m)/(s).
A crane with a 3000 kg counterweight and a 700 kg arm is capable of holding a 1200 kg load in equilibrium. Determine the position of the crane's pivot point as a function of the arm length, L.
Dilate ABC by a scale factor of 2 about the origin. A(3,2), B(0,2), C(0,3).
If the proper half-life of a muon is 2 microseconds, determine: a) Its half-life from the terrestrial system if it moves with a velocity of 0.99c. b) The distance it will travel, from the point of view of the Earth system, before disintegrating. c) The distance it will travel from the point of…
A rectangular loop (0.1 m x 0.3 m) of current is entering a uniform magnetic field (its motion is along its longer side) of magnitude B = 0.1 T into the page. The loop is traveling at 5 m/s and has a resistance of 5 Ohms. a. What is the induced current in the loop (magnitude and direction) when…
A rectangular loop (0.1 m x 0.3 m) of current is entering a uniform magnetic field (its motion is along its longer side) of magnitude B = 0.1 T into the page. The loop is traveling at 5 m/s and has a resistance of 5 Ohms. 1. What would be the effect on the induced EMF and time over which the…
Saturn's largest moon, Titan, is far from the Sun, but it has a weak gravitational field. If it could hold onto only one of the following compounds in its atmosphere, which would you expect? molecular hydrogen (H2) methane (CH4)
Which of the two would you expect to retain large amounts of molecular hydrogen? *Jupiter * Mercury
As part of a circus act, two trapeze artists perform a stunt using a pneumatic cannon. The first trapeze artist climbs a tall pole and then falls onto a spring-action bellows, which pressurizes the cannon. When the pressure in the cannon reaches a certain value, the second trapeze artist is…
A 28.0 kg solid cylinder is rolling without slipping across a horizontal surface at a speed of 6.4 m/s. How much work (in J) is required to stop it?
A baseball is batted at 43.81 m/s and caught by an outfielder. Suddenly, the outfielder gets hit by a car at 53.64 m/s. The person was not moving when the car hit them. What is the final velocity of the car and person as they are stuck together? Mass of Car (M_car) = 1000 kg Mass of Person…
Consider the uniform drawbridge with a mass of 55 kg and a length of 8.50 cm. The drawbridge is held stationary by a rope that attaches 1.2 cm from the end of the bridge. The rope makes an angle of 70 degrees with the vertical. Calculate the tension in the rope. (DON'T forget the force exerted…
You are on a boat and looking down and see a starfish at the bottom is what you see bigger or smaller than what the actual size of the star fish is? What phenomena is this? Why is this?
In terms of a loop of current, why is a North pole inseparable from a South pole? The positive current in a loop creates a negative current, and vice versa. These currents are the two poles. There is no relationship between current loops and North and South poles. The current loop creates an…
What is the reactance of a 2.60 μF capacitor at a frequency of 50.0 Hz ? What is the reactance of a 2.60 μF capacitor at a frequency of 1.30 MHz ?
Can someone please write out step by step the algebra for "connecting the gravitational potential energy with the result near the surface of the earth"? i.e. the relationship between U = mgh and U = -G(mM_E/R_E + h)
Particle A and B are identical charged particles, traveling a the same speed. Compare the force experienced by particle A (FA) to the force experienced by particle B (FB) when they each enter the magnetic field shown. Particle A enters perpendicular to the magnetic field. Particle B enters at…
Particle A and B are identical charged particles, traveling a the same speed. Compare the force experienced by particle A (FA) to the force experienced by particle B (FB) when they each enter an electric field. Particle A enters perpendicular to the electric field. Particle B enters at 65…
Object distance = 14.0 cm Image distance = 33.0 cm Use these two distances and the thin-lens formula to determine the focal length f of the lens and calculate the percent error between the calculated focal length and the specification 100 mm. Show your math.
A spring under a compression of x has a potential energy Vâ‚€. When the compression is doubled to 2x, the potential energy stored in the spring is 4Vâ‚€.
If you chose to apply a Holmes test during an investigation, in which stage of the PPDAC model would that be most appropriate to describe? Group of answer choices Problem Analysis Data Conclusion Plan
50=(9)/(5)40+32 and 40=(5)/(9)(50-32). Which temperature, 40 degrees Celsius or 50 degrees Fahrenheit, is warmer?
Is the following collision physically possible? Why/why not? A billiard ball (A) with velocity + 20 m/s strikes an identical ball (B) that is initially at rest. At the end of the collision, ball A is at rest and ball B has velocity +18 m/s.
A grumpy person shoots a speargun vertically up towards the hot air balloon from 1). If the spear leaves the gun at 30.0 m/s, can it hit the balloon? You may ignore drag.
(a) Does the upward force on an object in a fluid depend on the density of the fluid? (b) Find the equation for the force exerted by a fluid on an object submerged in it. (c) Find the formula for the buoyant force on an object in a fluid.
During an exercise, Maverick takes out an enemy and then turns to fly back to base, which is to his West. After travelling for 20 minutes, a new contact appears behind Maverick and he turns around to deal with it. It takes him 8.0 minutes to reach the new contact. If the distance between the…
5) Given that the speed of light in a vacuum is 299,792,458 m/s, and the speed limit on M1 is 110 km/h, calculate the ratio of the speed of light to the speed limit on M1.
if a cylinder has a mass of 50g, a radius of 1cm and a height of 3cm, what is its density?
Alien game Planet game Rocket game Moon game (16)/(50) 0.06 (12)/(25) 43%
A sound wave in the air has a frequency of 277 Hz and travels with a speed of 349 m/s. How far apart are the wave crests (compressions)?
A metal having density = 5,000 kg/m^3 and mass = M = 60,000 kg sank long ago into the sea. The density of the seawater is 1,000 kg/m^3. 1) The submerged volume of the metal is V = ___ m^3. 2) The buoyant force (BF) exerted by the water on the metal is BF = ____ N. 3) The tension force required…
Find the induced emf for a 18 cm diameter loop of wire in a 4.8 T magnetic field if it is parallel to the field and then is turned so that it is perpendicular to the field in 1.73 seconds. Give the answer in V, to the third decimal place.
write a rule for g translation of 2 units down reflection in y axis
A pilot goes into a steep descent. Their altitude reduces from 1200 ft to 900 ft. If their initial speed was 130 knots and the effect of drag was negligible during the maneuver, what is their final kinetic energy? The mass of their plane is 900 kg. Give your answer in base SI units.
a square meter is how many times as large as a square nanometer
2) A glider of mass 300 kg is in level flight at a speed of 80 knots. It collides with a freakishly big flying fox (a type of bat) of mass 30 kg that is flying in the same direction at 10 m/s. The bat becomes stuck to the fuselage. (i) Is this an elastic or totally inelastic collision? (i)…
Topic 6 Practice: Sketch the solution to each system of inequalities.
A coil has 190 turns enclosing an area of 13.0 cm^2. In a physics laboratory experiment, the coil is rotated during the time interval 0.042 s from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the…
Explain in detail how you will determine the equivalent resistance for the resistors connected in parallel
If the voltage across the power supply, V = 3V, and the total circuit current, I = 133.5 mA for a parallel circuit with resistors R1 = 56 Ω, R2 = 39 Ω, and R3 = 82 Ω, calculate the equivalent resistance for the three resistors connected in parallel.
A 2.00 kg frictionless block is attached to an ideal spring with a spring constant of 300 N/m on a horizontal frictionless surface. At t = 0, the block has a velocity of -4.00 m/s and a displacement of +0.200 m away from equilibrium. Find the maximum velocity of the block
I need help! I used a Campbell (1/4, G43, 2600 lb, 701). I measured it in air with my spring scale and it is 0 lb 5 oz. In water, it measured 0 lb 4 oz. I need to put these measurements in newtons. I hope I did that correctly, if not please correct me on that: [(air) 5 oz = 1.390068442 N ~…
The mass and charge of a water droplet are 1.9 × 10^(-4) g and 1.8 × 10^(-8) C, respectively. If the droplet is given an initial horizontal velocity of 5.5 × 10^5 î m/s, what magnetic field (in T) will keep it moving in this direction? (Assume the magnetic field is perpendicular to the…
If the constant velocity is 4 m/s and time is 5 seconds the displacement is? Choose one.
Find the induced emf for a 12 cm diameter loop of wire in a 2.3 T magnetic field if it is parallel to the field and then is turned so that it is perpendicular to the field in 1.27 seconds.
Can you please give a brief description/definition of each: 1. Causes of electromagnetic induction 2. Relationships between the number of turns, voltage, and current in the two types of transformers 3. Right-hand rule for a charge moving in a magnetic field 4. Earth's magnetic field 5.…
What would your weight be if you were able to travel to the center of the earth? Aren't you surrounded by mass in the center of the earth?
Can you please give an example of each concept and solve the example you give? Please and Thank you! 1. Problem involving torque on a current loop placed in a magnetic field 2. Finding current induced in a loop when it is placed in a magnetic field and the resistance in the circuit is…
OBSERVATION: A shiny red rock is sitting at the bottom of a swimming pool. You grab a long stick and poke it into the pool aiming for the rock, but the stick overshot the rock by a lot. ANSWER GUIDE: Use concepts from L3 and L4 to explain two aspects of this observation: (1) Why was the rock in…
OBSERVATION: A box with a pinhole is pictured below. (No lens, just a tiny hole.) We see a tree outside of the box and an upside-down image of the tree inside the box. ANSWER GUIDE: Use concepts from L1 and L2 to explain how the tree, which is not a light source, is sending light into the box…
A bottle of Chanel No. 5 perfume is 6 inches high and is placed 8 inches in front of a mirror whose focal length is -15 inches. Find the LSN of the image.
You are provided with a rectangular glass prism, styrofoam platform, paper, and four pins. Describe in detail how you would determine the refractive index of the glass prism experimentally.
An electrical resistance of 147 Ω is connected to a current source supplying 8 A. Determine the energy in Joule dissipated by the resistor in a time of 9 s.
We can explain the recoil that occurs when a rifle is fired by using O Any of the above. O equal and opposite impulses. conservation of momentum. O equal and opposite changes in momentum
Inside a massive star three Helium atoms (4.002602 u) can fuse into one carbon atom (12.000000 u). How much energy, in Joules, is released in this reaction? a) 1.1662 x 10-12 J b) 7.025 x 10-14 J c) 7.806 x 10-3 J d) 3.887 x 10-21 J
A series RLC circuit consists of a 65 Ω resistor, a 0.16 H inductor, and a 35 μF capacitor. It is attached to a 120 V /60 Hz power line what is the average power loss?
Answer the following questions: 1. Longer focal lengths correspond to optical devices which are a) fatter b) more curved and a) stronger b) weaker 2. Nearsighted people a) form images in front of their retinas b) behind their retinas …
A certain person is wearing eyeglasses of strength -3.0 D. What is this person's uncorrected near point? Use two significant digits. 2. A magnifier has a magnification of 5x. Using this magnifier held right up against the eye, what is the closest distance one can get to an object and still be…
A solenoid of diameter 14.1 cm and 198 turns of wire is connected to a battery. A 0.24 A current is pasing thorugh the solenoid. How much magnetic field will be induced at the center of the solenoid? Express your answer in mili Tesla show all work
A plastic army man, 6 cm long, is placed 30 cm in front of a concave mirror whose focal length is 50 cm. Find the location, size, and nature (LSN) of the image.
A 2.00 kg frictionless block is attached to an ideal spring with a spring constant of 300 N/m on a horizontal frictionless surface. At t = 0, the block has a velocity of -4.00 m/s and a displacement of +0.200 m away from equilibrium. Find a. the amplitude of the motion b. the period of the…
an airplane heading due east at 215 km/h is blown of course by a strong wind og 65 km/h blowing 45 degrees south of west
A transverse wave on a string is given by the wave function y(x, t) = (0.450 m) sin (31.4 rad/s)t - (3.14 m^(-1))x + 𜑠where 𜑠= ðœ‹/4. (a) What are the speed and acceleration of a point on the string that is at x = 0 m and t = 0.350 s? (Indicate the direction with the sign of your…
In an AC capacitor circuit, the current peaks before the voltage. A) at the same time as B) after C) before 0.5 the voltage. 2. Corrected_text: In an RLC circuit, Kirchhoff's loop rule can only be used with instantaneous values. A) instantaneous values B) amplitudes C) rms values 3.…
Consider a process that uses n = 40.5 moles of a monatomic ideal gas operating through the Carnot cycle shown on the right. The initial temperature and pressure of the gas are T1 = 325 K and P1 = 3.42 × 105 Pa respectively. Consider steps 1 → 2, 2 → 3, 3 → 4, and 4 → 1.
A superconducting ring with a radius of 1 mm and a radius of the wire r0 = 0.1 mm is being used to determine the persistence of the current. (a) Estimate the current in the superconductor if the magnetic field at the center of the ring is measured to be 1 mT. (b) What is the magnetic field…
Body of Water Number Rivers 2^(2)*5^(4)*10^(2) Lakes 2^(3)*5^(6) How many more rivers are there than lakes?
A square playground has an area of 10,000 ft². What is the side length of the playground? Show your work.
Places like Las Vegas where everywhere you go you smell smoke or some kind of tobacco product
2>(9)/(4) To draw a ray, plot an endpoint and select an arrow. Select an endpoint to change it fron closed to open. Select the middie of the ray to delete it.
Having some trouble getting this question right, just need some help solving it. Will upvote if correct. A 12.8 kg object is dropped from a height of 5.000 km. It has a drag coefficient of 0.985 and a cross-sectional area of 1.15 m^2. The air density is 1.20 kg/m^3. Determine the terminal…
r + 3 ≤ -1 To draw a ray, plot an endpoint and select an arrow. Select an endpoint to change it from closed to open. Select the middle of the ray to delete it.
A 55-kg woman in an elevator is accelerating downward at a rate of 1.4 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman's feet?
In a double-slit interference pattern, the 7th maximum from the central maximum corresponds to which value of m? A laser beam is shown through a grating, and a first-order maximum is produced at an angle of 9°. At what angle is the third-order maximum produced? In a single-slit experiment,…
An electrical resistance of 102 Ω is connected to a current source supplying 5 A. Determine the energy in Joule dissipated by the resistor in a time of 8 s.
A 105 Ω electrical resistor is connected to a current source supplying 7 A. Determine the energy in Joule dissipated by the resistor in a time of 17 s.
An electrical resistance of 189 Ω is connected to a current source supplying 3 A. Determine the energy in Joule dissipated by the resistor in a time of 6 s.
The location of the "dark fringes" in a single-slit diffraction experiment are given by aâ‹…sin𜃠= mðœ†, where m = "0, +1, -1, +2, -2....". The same formula with m replaced by (m + 1/2), gives the "approximate location of the bright" fringes (other than the central maximum), where m = "0,…
A large balloon used to sample the upper atmosphere is filled with 665 m3 of hydrogen. What is the mass of the hydrogen (in kg)? kg
A rectangular wire 8 cm high and 4 cm wide lies in the x-z plane and carries current I. (a) What is the magnetic moment m? (b) Place this loop in a magnetic field B = 50 mT√2 (ˆx + ˆy) and find the torque about the z-axis.
Consider a 2 cm flat strip, carrying 15 A of current in the ˆx direction. What is the force dF = I(dl × B) on the strip, per unit length, if placed in a field of B = 0.2 ˆy Tesla?
A unicorn running on a beach at 6 m/s changes speed at a constant rate of 2.5 m/s2 over a period of 1 seconds. What distance did the unicorn travel during this process?
Margie, who weighs 537 N, is standing on a bathroom scale that weighs 40.0 N. With what magnitude force does the scale push up on Margie? With what magnitude force does the floor push up on the scale?
(a) If the distance between two masses is quadrupled, how does the force of gravity change? (b) If the distance between two masses is one-third the original distance, what is the relationship between the new gravitational force and the original gravitational force? (c) On the stairway you raise…
An 80kg person steps on a bathroom scale that rests on the surface on an elevator. a) If the elevator is at rest what is the scale force reading? b) If the elevator accelerates upward at 3 m/s2, what is the scale force reading? c) If the elevator accelerates downward at 3 m/s2, what is the…
A uniform beam of mass M and length L is connected to a vertical wall by a hinge. The beam is exactly horizontal and is supported by a wire that is attached to the end of the beam and connected to the ceiling above. The angle between the wire and the beam is θ. (a) Find the tension in the wire…
A cart of mass m moving to the right with a velocity v collides with a cart of mass 3m moving to the left with a velocity of -v. The two carts stick together after the collision. What are the final velocities of the two carts?
The speed of light through a transparent substance is 2.00 x108 m/s. What is the refractive index of the substance?
A 2.00 kg object is pulled along a rough horizontal surface, mk = 0.20, by a 10.0 N force acting at an angle of 40° with the horizontal. Using the above information, the acceleration of the 2.00 kg object is closest to (A) 1.85 m/s2. (B) 2.50 m/s2. (C) 2.75 m/s2. (D) 3.80 m/s2.
What is the mass of water in the beaker (make sure it is just the water)? Explain how you found your answer. Pivot Interact Lab 9
A man pulls a 10-kg sled 50 meters along an angled hill with a force of 500 N, which elevates the man 30 meters above the bottom of the hill. The man then hops on his sled and slides from rest to the bottom of the hill back along his 50 meter path, during which a 300 N frictional force acts…
A 0.35 kg object moves horizontally to the right and a speed of 2.3 m/s. It collides with a 0.23 kg object that is at rest. After the collision, they stick together. What is their speed after the collision?
A converging lens has focal length 12 cm. If I place an object at a distance 48 cm, what is the image distance? Tries 0/5 If I place an object at a distance 48 cm, what is the magnification? Tries 0/5 If I place an object at a distance 14.4 cm, what is the image distance? Tries 0/5 If I place…
If you were given a wavelength of λ = 600 nm and knew that the width of the two slits were d = 0.4 mm, and you were to measure a distance of t = 1 m between the slits and the screen on which the light is projected, determine the distance between the central peak of your diffraction pattern and…
A light source is embedded in a crystal with an unknown index of refraction. Light which originates inside the crystal and reaches the crystal-air interface with an angle of incidence greater than 30 degrees is totally internally reflected. What is the angle of refracted light when light is…
What is the overall temperature change of the water during the time it is being heated by the light bulb? Explain how you found your answer. physics lab 9
High-frequency traders in Chicago rely on networks that communicate financial data from New York over a one-way distance of 825 miles. If the round trip for the data through a high-speed fiber optic cable takes 13.5 milliseconds, what is the speed of light through the cable? Tries 0/5 What is…
1. If a 15 ohm and a 20. ohm pair of resistors are connected in series, what single resistor can be used so as to get the same current flow as the two in series?
There are two objects separated by a 100.0 cm distance. One on the left has a mass of 45 kg, and the other one on the right has a mass of 9 kg. Calculate the center of mass point of the system from the left object.
If you lift the child of mass 20.0 kg by bending your elbow joint, calculate the torque you created on the elbow. Take the distance from your hand to elbow as 0.9 m.
A person does 7.00×10^6 J of useful work in 8.30 h. Working at this rate, how long will it take this person to lift 2.00×10^3 kg of bricks 1.70 m to a platform? To solve this problem, it will be necessary to first find the average useful power output of the person. What is the average useful…
An archer notches an arrow of mass 29.0 g and draws back on the bowstring, exerting an average force of 283 N over a distance of 46.0 cm. What is the speed of the arrow after it is released? (Assume there is negligible energy lost to sound or vibrations.)
Assume that the Milky Way Galaxy's main disk is 1000 LY thick and has a diameter of 100,000 LY.Part (a) What is the volume of the main disk of the Milky Way Galaxy in cubic light-years? Volume = |LY3Part (b) What is the number density of stars in the disk, assuming that the disk contains 300…
A 88.0 g toy car is propelled by a compressed spring that starts it moving. The car follows the curved track as shown below. Find the final speed of the toy car if its initial speed is 2.14 m/s and it coasts up the frictionless slope, gaining 0.140 m in altitude. Find the final speed of the…
Use the focal length 10.0 cm and the thin lens equation, calculate the necessary object distance to get a magnification of Mo = – 5. That is di = 5do. Show your math. What are the object distance and image distance?
Our solar system is 4.6 billion years old. Based on the age of the solar system, how many galactic years has planet Earth been around? (Use 2.25 × 10^8 years as the length of one galactic year.) Time = |galactic years
What is the smallest equivalent resistance when three resistors (1.32 Ω, 3.42 Ω, and 3.74 Ω) are connected together?
A carbon rod with a radius of 0.3 mm is used to make a resistor. What length of the carbon rod should be used to make a 2.5 Ω resistor? The resistivity of this material is 9.7 × 10^(-5) Ω · m. Answer in units of mm.
You are throwing a basketball and the ball takes the path of a projectile. Assuming negligible air resistance, what can you say about the horizontal and vertical components of the velocities along the path of the projectile?
The emf of a battery is E = 17 V . When the battery delivers a current of 0.7 A to a load, the potential difference between the terminals of the battery is 15 V volts. Find the internal resistance of the battery. Answer in units of Ω.
The force of gravity between two planets is 8.0 x 1020 N. If the mass of one planet is somehow doubled, Calculatethe force of gravity now?
A length of wire is cut into 8 equal pieces. The 8 pieces are then connected parallel, with the resulting resistance being 3 Ω. What was the resistance r of the original length of wire? Answer in units of Ω.
What is the gravitational potential energy relative to the generators of a lake of volume 47.0 km³ (mass = 4.70×10^13 kg), given that the lake has an average height of 40.0 m above the generators? Compare this with the energy stored in a 9-megaton fusion bomb, 3.50×10^16 J. The gravitational…
A spring extends 145 cm when a 1.0 kg load is suspended from it. What would be the extended length if a 2.0 kg load were suspended from it?
How much energy is needed to convert 9kg of ice at zero degree into 80 °C water? Specific heat of water is 4186 J/kg C, specific heat of ice is 2090 J/kg C and latent heat of ice is 3.33 x10 J/kg
which of the following has the greatest difference between the first and the second ionisation energy
Calculate the force needed to bring a 857 kg car to rest from a speed of 90.0 km/h under the following circumstances. (Define the positive direction to be the direction of the velocity.) Calculate the force needed to bring the car to rest in a distance of 133 m (a fairly typical distance for…
A nurse injects liquid medicine into your body by exerting a 2.0 N force onto a hypodermic syringe. If the barrel of the syringe is 7.85 x 10^5 m² and the syringe's needle is 2.55 x 10^-8 m² in cross-sectional area, how many newtons of force does the medicine come out from the needle into…
A material is known to consist entirely of an isotope of calcium, although the particular isotope is not known. From such limited information, which of the following quantities can you specify for the isotope?
system does 100 J of work to its surroundings and gains 50 J of heat in the process. Calculate the change in the internal energy of the system. Determine if the internal energy is increased or decreased during the process.
How fast must a 3.31×10^3 kg elephant move to have the same kinetic energy as a 68.0 kg sprinter running at 9.00 m/s? To solve this problem, it will be necessary to first determine the kinetic energy of the sprinter. What is the kinetic energy of the sprinter? How fast must the elephant move…
A physical pendulum is composed of a thin, homogeneous square plate with mass M and side L. The plate has a small hole near one of the vertices so that it can oscillate freely around an axis passing through the hole (perpendicular to the plane of the plate) under the action of a uniform…
What is the position of the point plotted in polar coordinates?
Suppose you have a device that uses 15 A of current at 120 V AC. How much current would you need on a 7200 V incoming power line? How much on a 50,000 V high power line?
A 0.50-kg block is initially dropped from a height h above a spring with a spring constant of k = 800 N/m. The block falls onto the spring and compresses it a distance of d = 10 cm before coming to a stop. From what height h above the spring was the block released from initially? Please…
Consider the atoms C-12, C-14 and N-14 from greatest to least rank them by the number of (a) protons in the nucleus, (b) neutrons in the nucleus, (c) nucleons in the nucleus.
If two objects (A & B) travel from X to Y at a constant speed of 50 km/h ? Choose one.
(v-3)/(v^2-6v+9) If there is more than one value, separate them with commas
ten more than thrice a number is at most twice another number
a. A ballistic pendulum used to measure the velocity of a bullet is constructed by suspending a wooden block of mass M from an inextensible cord of length b in the gravitational field g. The pendulum is initially at rest in the vertical position. A bullet of mass m is fired into the block and…
Knowing that Millikan’s experiment gives a value of 1.609 x 10-19 coulombs for the charge on an electron, calculate the mass of the electron from your experimental value of e/m. Compare the results to the accepted value of 9.1099 x 10-31 kg by using % error.
Which measurement is closest to the volume of the sphere in cubic meters?
find the speed of an electron whose kinetic energy is 500 eV in scientific notation.
(b) Work out the length of KL. Give your answer correct to 3 sig
If A=(-2,-4) and B=(-8,4), what is the length of bar (AB) ? A. 14 units B. 16 units C. 12 units D. 10 units
If an earthquake has an intensity of 61000 times l_(0), what is the magnitude of the earthquake?
r in the box provided. No math from there until all 15 are con 47x+11
Simplify the following expression, leaving your answer in exponent form. (7^(9))^(3)
Solve the equation. Drag each SC. If the polynomial has a repeated x^2 - 4x + 40 = 0.
Average velocity can be used to calculate the distance traveled even if the velocity changes over the time involved
Earthquake was 10^(7.33)*1. What was the magnitude on the Richter scale?
if the magnitude of a vector is 10, and the direction is 60, what is the vector
Suppose you were told that someone had a hearing loss of 20 dB at 125 Hz, and that the normal threshold of hearing was 633 uPa at that frequency. a) What is the normal threshold of hearing at 125 Hz in dBSPL? b) What sound pressure (in uPa) would be the least intense that person could hear at…
Suppose you were told that someone had a hearing loss of 20 dB at 125 Hz, and that the normal threshold of hearing was 633 Pa at that frequency. a) What is the normal threshold of hearing at 125 Hz in dB SPL? b) What sound pressure (in Pa) would be the least intense that person could hear at…
Light of frequency 12E14 Hz is incident on a plate of zinc (work function of zinc = 6.63E-19 J), which causes electrons to be ejected from the zinc. What is the maximum velocity that the ejected electrons can have?
Take a pure sound propagating in air at 20°C, whose wavelength is 3.43 m. A second pure sound of the same wavelength is delayed by 2.5 ms relative to the first. What is the phase difference in degrees between the two sounds?
Two rugby players are pushing on either side of a tackle sled. Player A is pushing down and to the right with 275N of force at an angle of 13 degrees above the horizontal. Player B is pushing to the left with a force of 98N in line with the horizontal. What is the net work done if the sled is…
Calculate the water pressure at the bottom of a 40-m-high water tower.
In a circle of radius 11cm, the length of the arc subtended by a central angle of 0.6 radians is:
a circular flower bed is 20m in diameter and h as a circular sidewalk around it that is 2m wide
6. A freely floating astronaut is stranded in space. In order to move she must blast compressed air. If her mass is 60 kg and there is 0.10 kg of compressed air in her tank that can shoot out at 40 m/s, with what speed can the astronaut move? a. 2400 m/s b. 40 m/s C. 4 m/s d. 66.667 m/S e.…
a) Why can't one hear the sound of an alarm clock if it is placed in a vacuum? b) If the frequency of a sound wave is doubled, how much does its wavelength change? How much does its speed change? c) Consider a pure sound propagating in air at 20°C, with a wavelength of 3.43 m. A second…
find the distance in centimeters of a 851.61 volts electric potential from a 7.58 nc point charge
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