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Let 20.9 J of heat be added to a gas. As a result, Its volume changes from 50.0 to 100.0 cm^3 while the pressure remains constante at 1 atm. By how much did the internal energy of the gas change?
What is the magnitude of the acceleration of a rising hot-air balloon if the ratio of the air density outside the balloon to that inside is 1.25? Neglect the mass of the balloon fabric, the basket and its contents.
A 1.2µF capacitor is charged to a potential difference of 11.0V. The wires connecting the capacitor to the battery are next disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across t..
A 4.20kg steel ball strikes a wall with a speed of 7 m/s at an angle of 60° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20 s, what is the average force exerted by the wall on bal..
Driving home from school, you spot a ball rolling out into the street. You brake for 1.20 s, slowing your 950 kg car from 16.0 m/sto 9.50 m/s. How far did you travel while braking?
A 1.2 kg particle moves from an initial position r1 = 4i - 2j + 3k m to a final position r2 = 7i - 3j -4k m while a force F = 6i - 4j + 2k N acts on it. What is the work done by the force on the particle
The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and examine the average pressure of the expanding gas.
a slide projector needs to create a 98-cm-high image of a 2.0 cm slide. the screen is 300 cm from the slide. what focal
What is the highest height reached by the rocket. what is its initial speed as it leaves the ground.
a candle 8.80 cm high is placed in front of a thin converging lens of focal length 40.0 cm. what is the image distance
A 500 g block slides along a frictionless surface at a speed of 0.35m/s .it runs into a horizontal mass less spring with spring constant 50N/m that extends outward from a wall.
A hollow sphere has a mass of M = 8.00 kg and a radius of R = 60.0 cm. Determine the sphere's rotational inertia about an axis that is tangent to the OUTER surface of the sphere
What is the electric field at the test charge?
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