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Physics 101 Mechanics Q&A Archive of May 25, 2023

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May 25 of 2023

The phase angle of an LRC series circuit at a frequency of 1.8 kHz with a capacitive reactance of 200 Ī©, a resistor of 200 Ī© and a certain inductance is 15.0Ā°. What is the value of the inductance in this circuit?
A \( 950 \mathrm{~kg} \) cylindrical can buoy floats vertically in salt water. The diameter of the buoy is \( 0.900 \mathrm{~m} \). Calculate the additional distance the buoy will sink when a \( 70.0 \mathrm{~kg} \) man stands on top of it. (5 Marks)
I An electrostatic ion thruster accelerates positively charged xenon ions (g = 1.60 x 10-19 C) from rest using two oppositely charged plates separated by Ar = 0.15 m. A uniform electric field E = 1.5 x 104 N/C is maintained between the plates. Each xenon ion has a mass of 2.18 Ɨ 10-25 kg.ā€¦
find the pressure of the nozzle inlet (5 in diameter) to shoot a stream of watter that reaches 50 ft into the air. nozzle outlet 2 in diameter
calculate the accelerating force needed to change the speed of a \( 20-1 \mathrm{~b} \) object from \( 18 \mathrm{ft} / \mathrm{s} \) to \( 50 \mathrm{pt/s} \) in a distance of \( 40 \mathrm{ft} .(F=17 \mathrm{lb}) \).
A sealed tank containing sea water is to a height of \( 11.0 \mathrm{~m} \) also contains air above the sea water at a gauge pressure of \( 3 \mathrm{~atm} \). Water flows out from the bottom through a small hole. Determine how fast the water is flowing out of the small hole. (5 Marks)
A bottled water plant fills its bottles using a nozzle directed straight down. Water exits the nozzle at a flow rate of 115 mL/s, and the nozzle has a cross-sectional area of 0.31 cm2. The water falls 15.3 cm before striking the bottom of the bottle. What is the speed of the water stream whenā€¦
What is the value of gravity?
What is the speed of the taxi at the top of a 5.60 m radius loop if the intially at rest start location was 27.7 m above the bottom of the loop?
A woman pushes an initially stationary 11.3 kg gift up a 15.90 ramp a distance of 7.21 m. If she pushes with a constant force of 84.0 N and the coefficient of friction is 0.333, what is the final velocity of the gift?
In the circuit given below, \( R=2 \mathrm{k} \Omega \). Using mesh analysis, find the value of \( v_{0} \). The value of \( v_{0} \) in the circuit is
In the circuit given below, \( R=50 \Omega \). Calculate the mesh currents \( i_{1} \) and \( i_{2} \). The value of \( i_{1} \) in the circuit is The value of \( i_{2} \) in the circuit is
In the circuit given below, \( I_{1}=115 \mathrm{~mA} \) and \( I_{2}= \) \( 75 \mathrm{~mA} \). Write the node-voltage equations by inspection. The node-voltage equations in matrix form is given by \[ \left(\begin{array}{ccc} G_{11} & -0.1 & -0.05 \\ -0.1 & G_{22} & -0.2 \\ -0.05 & -0.2 &ā€¦
Find \( v_{x} \) and \( i_{x} \) in the circuit given below. Use \( v_{i}=50 \mathrm{~V} \) The value of \( v_{x} \) is \( V \) and the value of \( i_{x} \) is
In the circuit given below, \( R=18 \Omega \). Find \( v_{0} \) using mesh analysis. The value of \( v_{0} \) in the circuit is
c. boiling \( 21.1 \mathrm{~g} \) of water at \( 100^{\circ} \mathrm{C} \) \( (21.1 y) \)
In the circuit given below, \( R=7 \Omega \). Apply mesh analysis and find \( I_{0} \). The value of \( I_{0} \) in the circuit is
state the prodecure and formula for measuring 100 optical pins?
In the circuit given below, \( R=70 \Omega \). Solve for \( V_{x} \) using nodal analysis.
In the circuit given below, \( R=8 \Omega \). Calculate \( v_{1} \) and \( v_{2} \). The value of \( v_{1} \) in the circuit is The value of \( v_{2} \) in the circuit is
Find the weight for each mass. M = 30kg
Find the acceleration necessary to give an automobile a mass of 1750 kg an acceleration of 3.00 m/s^2
scientist have found evidence that planet mars may once have an ocean 0.0500kam deep .the acceleration due to gravity ion mars is 3.71m/sĀ².assuming this ocean was made up of fresh water with a density of 1000kag/mĀ³?A. calculate the pressure at the bottom of such a ocean , neglecting airā€¦
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at a certain point in a horizontal pipe,the water speed is 2.5m/s and the gauge pressure is 1.8 x 10ā“ Pa.find the pressure at a second point in the line if the cross sectional area at the second point is twice that at the first
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Activity 2: Draw Me! DIRECTIONS: Illustrate the two motions of the Earth inside Box A and B. Follow procedures 1 to 3. What to do: 1. Draw inside Box \( A \) the Earth's rotation and its revolution inside Box B. 2. Use a 1-peso coin to draw the Sun and a 25 centavo coin to draw the Earth. 3.ā€¦
Expression For Age And Were Also Derived For The Case Where The Nucleus Was In The Shape Of A Spherical Cap
Based on the data below, which subvtance would be considered an ICNIC compound? \begin{tabular}{|c|c|c|c|c|} \hline Compound: & Texture & Seconds to Melt & Solubility & Conductivity \\ \hline \( \mathbf{X} \) & \( \begin{array}{c}\text { Small gramuls, break } \\ \text { when pressedā€¦
A man pours 20 litres of water with a temperature 25 ā—¦C into the plastic bucket. Then, he puts an ice cube with a side length of 13 cm with a temperature āˆ’10 ā—¦C and a copper ball with a diameter 75 mm and temperature 86 ā—¦C. What is the final temperature when the system reaches theā€¦
the dam is 500m and the water is 40m deep at the dam calculate the force exerted against the dam
6. Two perfectly black parallel plates \( \mathrm{A} \) and \( \mathrm{B} \) of equal area facing each other are maintained at constant temperature \( T_{A} \) and \( T_{B}\left(T_{A}>T_{B}\right) .99 \) perfectly black and conducting identical screens of same area as plates are introducedā€¦
A 50.0 kg skier with an initial speed of 14.0 m/s coasts up a 2.50 m high rise as shown in the following figure. Find her final speed at the top (in m/s), given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assumingā€¦
( 8 marks) Assume the switch is closed.) DDRD has been initialised and the system is power up, select the correct statement: a. LEDO and LED1 are OFF b. LEDO and LED1 are ON c. LEDO is OFF, LED1 is ON d. LEDO is ON and LED1 is OFF int val=0; PORTD I=0x06; while (1) \{ PORTD \& \(ā€¦
33. Diverging lens hasā€¦ā€¦ā€¦ā€¦. focal point. A) a plane B) a virtual C) a real D) none of these
RTC-1- Let's stop for one second, and not move our arms so much. It would be an exotic moment without rush, without engines, we would all be together in a sudden strangeness. (a) What does the poet tell us to do and why? (b) Which moment would be an 'exotic moment"? (c) In what manner would weā€¦
When you turn on the hot water to wash dishes, the water pipes have to heat up. How much heat is absorbed by a copper water pipe with a mass of 2.3 kg when its temperature is raised from 20.0Ā°C to 80.0Ā°C? [Specific Hear Capacity for copper = 385 J/kg.K ]
2. Determine the minimum frequency at which the circuit depicted in Figure (2) can effectively integrate the input voltage, \( V_{\text {in }} \), and calculate the resultant integrated output voltage, \( V_{\text {out }} \). Figure (2)
A. \( 1.000 \mathrm{~N} / \mathrm{m}^{2} \) B. \( 10.000 \mathrm{~N} / \mathrm{m}^{2} \) C. \( 100.000 \mathrm{~N} / \mathrm{m}^{2} \) D. \( 1.000 .000 \mathrm{~N} / \mathrm{m}^{2} \) 3. Sebuah balok kayu yang volumenya \( 9000 \mathrm{~cm}^{3} \) terapung di sebuah kolam. Jika massa jenis airā€¦
Astrophysical fluids are ultimately made of particles. We have seen in lectures that the fluid approximation is valid if the mean free path of a particle is small compared to the typical length over which macroscopic quantities (e.g., density) vary. The mean free path in elementary kineticā€¦
Consider the circuit shown in Figure 3. Find (a) the current in the \( 20.0 \Omega \) resistor and (b) the potential difference between points \( a \) and \( b \). Figure 3
For a supernova explosion of energy E = 10^51 ergs use what you know about the blast- wave solutions to derive the equation for the temperature of the post-shock gas with time. (a) Assume that the supernova occurs in a region where the interstellar gas number density is the typical diffuse gasā€¦
The gas clouds of the Magellanic Leading Arm have a velocity of āˆ¼ 300 km sāˆ’1 travelling through a medium (assume atomic hydrogen) of n0 āˆ¼ 5Ɨ10āˆ’2 cmāˆ’3. If the gas clouds have an internal magnetic field, estimate the magnetic field strength that would be required for magnetic pressure to balanceā€¦
(I) (4) A jeep statt from the state of rest ifits welocity becounss \( 60 \mathrm{~km} / \mathrm{h} \) in \( 2 \mathrm{~min} \) what is the acclemation of the jilp. what is the Asstansce covved by jeep.
please answer.
Determine la fuerza resultante para el sistema, en donde \( F=400 \mathrm{~N} \) y \( \theta=60^{\circ} \)
\( 20 \mathrm{~L} \) tank contains \( 0.225 \mathrm{~kg} \) of helium at \( 13^{\circ} \mathrm{C} \). The molar mass of helium is \( 4 \mathrm{~g} / \mathrm{mol} \) (i) How many moles of helium are in the tank (ii) What is the pressure in tank, in Pascal's and in atmosphere?
The voltage across the 16 resistor in the circuit in Fig. P2.25 is 80 V, positive at the upper terminal. Find the power dissipated in each resistor.b) Find the power supplied by the 125 V ideal volt- age source.c) Verify that the power supplied equals the total power dissipated.Figureā€¦
Activity 1 Throw Me! I. Objective: Compare the horizontal distance traveled, maximum height reached and time of flight of projectiles launched at different angles above the horizontal axis II. Material ball III. Procedure: 1. Throw a ball at three different launch angles: \( 30^{\circ},ā€¦
4. a) What is the efficiency of a cyclical heat engine in which \( 75.0 \mathrm{~kJ} \) of heat transfer occurs to the environment for every \( 95.0 \mathrm{~kJ} \) of heat transfer into the engine? (b) How much work does it produce for \( 100 \mathrm{~kJ} \) of heat transfer into theā€¦
What is escape velocity?
Intensive property
To solve the ordinary differential equation[3 frac{d y}{d x}+5 y^{2}=sin x, y(0)=5]by Euler's method, you need to rewrite the equation as
Across 2-remove hard deparits in wafer 1. Very useful in wiping mast tools and equipment. 5. To place under wafer 3. Part of an electric knize which 8. A Type of vinegar used for clearing than for food should be lubricated 4. hansti or hortiul in nature 9. Part of a blender which may be plasticā€¦
Across 2-remove hard deparits in vaafer 6. To place under water 8. A Type of vinegar used for clearing than for food 9. Part of a blender which may be plastic or steel 10. A thing that gives out sometting 1. Very useful in wiping mast tools and equipment. 3. Part of an electric knife whichā€¦
(1) \( \sqrt{n a} \) (2) na (3) \( n^{2} a \) (4) \( n^{3} a \) A car is moving at a certain speed. The minimum distance over which it can be stopped is \( \mathrm{x} \). If the speed of the car is doubled, what will be the minimum distance over which the car can be stopped? (1) \( 4 x \) (2)ā€¦
Show that when a string of length L plucked at the centre through height h, the energy in the nth mode is given by En = (16Mh2v2)/n2Ļ€2L2 where v is the wave velocity and M is the total mass of the string. Compare the energies in the first and the third harmonics of a string plucked at theā€¦
Determine the reaction force at the support A, the equation of the elastic curve, and the slope at A as given. (Note: After cutting a distance x from point A, start the solution by writing the moment equation)?
Apply Statistical physics to determine the intern energy and the specific Heat Capacity of poly a gases.
What is the water flow rate from the faucet, assuming a steady flow?
During a pilot test, a Non-Newtonian fluid flows in a horizontal 37 mm ID pipe. The pressure drop per length is measured to be 917 Pa/m and it is experimentally determined that the Shear stress (Ļ„) [Pa] and Shear rate [s^-1 ] are related by the following equation: Estimate the average linearā€¦
III. Determine the location of North and South Poles
ii. Delermine the locakion of Worth and Jowth Poles
2. An average force of \( 50 \mathrm{~N} \) is exerted on a 4-kg cart for 2 seconds. a. What is the impulse? b. What is the change in momentum?
activities the dolphins partake in at certain times of the day. The numbers in table bel represent the number of groups of dolphins that were partaking in an activity at certi times of days. Is there enough evidence to show that the activity and the time period independent for dolphins? Test atā€¦
10. Considerando la figura 1.29 , responde: Si los Ć”ngulos intemos miden: \[ \begin{array}{l} 4 a=20^{\circ} \\ x b=35^{\circ} \\ x c=35^{\circ} \\ x d=55^{\circ} \end{array} \] a) Calcular la medida del \( \angle A D C \) b) Calcular la medida del \( \angle A E B \) c) Calcular la medida delā€¦
ASSIGNMENT \#2 | Machine Design II (Spring 2023) \( ----7 \) Instructions 2. Remember that quality of the expression matters 3. References must be provided at the end 4. Maximum length: 4 pages (A4 size) Contents Title: Stress concentration Subtitle: How is a mechanical engineer supposed toā€¦
Solve \#1 - Find the force needed to accelerate a \( 100 \mathrm{~kg} \) mass by 20 \( \mathrm{m} / \mathrm{s}^{2} \).
Solve for Ideal Gas as a function of altitude
1. An arrow with a mass of 115 g and a velocity of 50.0 m/s hits and sticks to a piece of wood of mass 2.10 kg. If the block of wood is on a frictionless, horizontal surface, with what velocity will the block move? [2 marks] 2. A 2.50 kg mass moving 7.50 m/s to the right collides head on withā€¦
a football player kicked the ball at a speed of 27.0 m/s. determine the range and height at a given angle 20 degrees
Un auto se desplaza a \( 36 \mathrm{~km} / \mathrm{h} \) sobre una pista rectilĆ­nea. De pronto frena, disminuyendo su rapidez hasta deternerse luego de 5 segundos. Calcula el mĆ³dulo de su aceleraciĆ³n. a) \( 2 \mathrm{~m} / \mathrm{s}^{2} \) b) \( 3 \mathrm{~m} / \mathrm{s}^{2} \) c) \( 4ā€¦
A vertical pipe column with an outside diameter of \( D=114 \mathrm{~mm} \) and an inside diameter of \( d=102 \mathrm{~mm} \) supports the loads shown. Determine the normal and shear stresses acting at point \( H \), and show these stresses on a stress element. Plan the Solution Theā€¦
2. Complete the table below and compute for MAD, MSE and MAPE. (25 points)
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Assume that the sun collapses into a neutron star with a radius of 20km, Calculate its new density. Would centrifugal force break it apart?
The phase angle of an LRC series circuit at a frequency of 1.8 kHz with a capacitive reactance of 200 Ī©, a resistor of 200 Ī© and a certain inductance is 15.0Ā°. What is the value of the inductance in this circuit?
A bottled water plant fills its bottles using a nozzle directed straight down. Water exits the nozzle at a flow rate of 115 mL/s, and the nozzle has a cross-sectional area of 0.31 cm2. The water falls 15.3 cm before striking the bottom of the bottle. What is the speed of the water stream whenā€¦
What is the value of gravity?
What is the speed of the taxi at the top of a 5.60 m radius loop if the intially at rest start location was 27.7 m above the bottom of the loop?
A woman pushes an initially stationary 11.3 kg gift up a 15.90 ramp a distance of 7.21 m. If she pushes with a constant force of 84.0 N and the coefficient of friction is 0.333, what is the final velocity of the gift?
A 50.0 kg skier with an initial speed of 14.0 m/s coasts up a 2.50 m high rise as shown in the following figure. Find her final speed at the top (in m/s), given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assumingā€¦
33. Diverging lens hasā€¦ā€¦ā€¦ā€¦. focal point. A) a plane B) a virtual C) a real D) none of these
The gas clouds of the Magellanic Leading Arm have a velocity of āˆ¼ 300 km sāˆ’1 travelling through a medium (assume atomic hydrogen) of n0 āˆ¼ 5Ɨ10āˆ’2 cmāˆ’3. If the gas clouds have an internal magnetic field, estimate the magnetic field strength that would be required for magnetic pressure to balanceā€¦
please answer.
Show that when a string of length L plucked at the centre through height h, the energy in the nth mode is given by En = (16Mh2v2)/n2Ļ€2L2 where v is the wave velocity and M is the total mass of the string. Compare the energies in the first and the third harmonics of a string plucked at theā€¦
1. An arrow with a mass of 115 g and a velocity of 50.0 m/s hits and sticks to a piece of wood of mass 2.10 kg. If the block of wood is on a frictionless, horizontal surface, with what velocity will the block move? [2 marks] 2. A 2.50 kg mass moving 7.50 m/s to the right collides head on withā€¦
Assume that the sun collapses into a neutron star with a radius of 20km, Calculate its new density. Would centrifugal force break it apart?