Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
Sadie Daniels

Sadie D.

Divider

Viewed Questions

A singly charged positive ion has a mass of $3.20 \times 10^{-26} \mathrm{kg}$ After being accelerated from rest through a potential difference of $833 \mathrm{V},$ the ion enters a magnetic field of $0.920 \mathrm{T}$ along a direction perpendicular to the direction of the field. Calculate the radius of the path of the ion in the field.

A singly charged positive ion has a mass of $3.20 \times 10^{-26} \mathrm{kg}$ After being accelerated from rest through a potential difference of $833 \mathrm{V},$ the ion enters a magnetic field of $0.920 \mathrm{T}$ along a direction perpendicular to the direction of the field. Calculate the radius of the path of the ion in the field.

Physics for Scientists and Engineers

Three blocks are in contact with each other on a frictionless, horizontal surface, as in Figure P5.56. A horizontal force $\mathbf{F}$ is applied to $m_{1} .$ If $m_{1}=2.00 \mathrm{~kg}, m_{2}=$ $3.00 \mathrm{~kg}, m_{3}=4.00 \mathrm{~kg}$, and $F=18.0 \mathrm{~N}$, draw a separate free-body diagram for each block and find (a) the acceleration of the blocks, (b) the resultant force on each block, and (c) the magnitudes of the contact forces between the blocks.

Three blocks are in contact with each other on a frictionless, horizontal surface, as in Figure P5.56. A horizontal force $\mathbf{F}$ is applied to $m_{1} .$ If $m_{1}=2.00 \mathrm{~kg}, m_{2}=$ $3.00 \mathrm{~kg}, m_{3}=4.00 \mathrm{~kg}$, and $F=18.0 \mathrm{~N}$, draw a separate free-body diagram for each block and find (a) the acceleration of the blocks, (b) the resultant force on each block, and (c) the magnitudes of the contact forces between the blocks.

Fundamentals of Physics

A player throws a ball upwards with an initial speed of $29.4 \mathrm{~m} \mathrm{~s}^{-1}$. (a) What is the direction of acceleration during the upward motion of the ball? (b) What are the velocity and acceleration of the ball at the highest point of its motion? (c) Choose the $x=0 \mathrm{~m}$ and $t=0 \mathrm{~s}$ to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of $x$ -axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion. (d) To what height does the ball rise and after how long does the ball return to the player's hands ? (Take $g=9.8 \mathrm{~m} \mathrm{~s}^{-2}$ and neglect air resistance).

A player throws a ball upwards with an initial speed of $29.4 \mathrm{~m} \mathrm{~s}^{-1}$. (a) What is the direction of acceleration during the upward motion of the ball? (b) What are the velocity and acceleration of the ball at the highest point of its motion? (c) Choose the $x=0 \mathrm{~m}$ and $t=0 \mathrm{~s}$ to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of $x$ -axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion. (d) To what height does the ball rise and after how long does the ball return to the player's hands ? (Take $g=9.8 \mathrm{~m} \mathrm{~s}^{-2}$ and neglect air resistance).

NCERT Class 11 Part 1 - Physics

The speed of sound in air (in $\mathrm{m} / \mathrm{s}$ ) depends on temperature according to the approximate expression $$v=331.5+0.607 T_{\mathrm{C}}$$ where $T_{\mathrm{C}}$ is the Celsius temperature. In dry air the temperature decreases about $1^{\circ} \mathrm{C}$ for every $150 \mathrm{m}$ rise in altitude. (a) Assuming this change is constant up to an altitude of $9000 \mathrm{m},$ how long will it take the sound from an airplane flying at 9000 m to reach the ground on a day when the ground temperature is $30^{\circ} \mathrm{C} ?$ (b) What If? Compare this to the time interval required if the air were a constant $30^{\circ} \mathrm{C}$. Which time interval is longer?

The speed of sound in air (in $\mathrm{m} / \mathrm{s}$ ) depends on temperature according to the approximate expression $$v=331.5+0.607 T_{\mathrm{C}}$$ where $T_{\mathrm{C}}$ is the Celsius temperature. In dry air the temperature decreases about $1^{\circ} \mathrm{C}$ for every $150 \mathrm{m}$ rise in altitude. (a) Assuming this change is constant up to an altitude of $9000 \mathrm{m},$ how long will it take the sound from an airplane flying at 9000 m to reach the ground on a day when the ground temperature is $30^{\circ} \mathrm{C} ?$ (b) What If? Compare this to the time interval required if the air were a constant $30^{\circ} \mathrm{C}$. Which time interval is longer?

Physics for Scientists and Engineers

Questions asked

ANSWERED

Prabhat Tyagi verified

Numerade educator

Steve Nash makes a free-throw shot at the basket. The mass of the basketball is 0.62 kg. The basketball leaves his hand at a speed of 7.2 m/s from a height of 2.21 m above the floor. Using a conservation of energy analysis, find the speed of the basketball as it goes through the hoop, 3.05 m above the floor. Round your final answer to 2 significant digits. Ignore air resistance.

View Answer
 divider
ANSWERED

Prabhat Tyagi verified

Numerade educator

A 2.0 x 10-4 kg oil drop is held in place by a downward electric field of 3.0 x 102 N/C. What is the charge on the oil drop?

View Answer
 divider
ANSWERED

Penny Riley verified

Numerade educator

A certain planet has Earth's mass, but only one-quarter its diameter. The escape speed from this planet in terms of Earth's escape speed vE is

View Answer
 divider
ANSWERED

Vishal Gupta verified

Numerade educator

To impress the class, a physics teacher uses a pail filled with water attached to a rope in a classic physics demonstration. The teacher then whirls the pail in a vertical circle. If the length of the rope from her hand to the centre of the pail is 1.25 m, how slow can she swing the pail to complete the circle? Justify your answer fully. Make sure to draw a free-body diagram of the pail

View Answer
 divider
ANSWERED

Narayan Hari verified

Numerade educator

. Refer to the diagram to the right. Mass 1 (m1= 175 g) is on a table connected to a massless pulley, as shown. The coefficient of static friction between m1 and the table is 0.240. What is the maximum mass (in kg) of m2 before m1 starts

View Answer
 divider
ANSWERED

Penny Riley verified

Numerade educator

A worker pushes down along the handle of a cart of 20.0 kg mass with a force of 145 N. The handle makes an angle of 60.0° with the horizontal ground. If the coefficient of kinetic friction between the cart and the ground is 0.105, determine the magnitude of the acceleration of the cart (in m/s2).

View Answer
 divider