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Question: Suppose you are driving your car on a business trip and are travelling at 30 m/s. Your boss, who is waiting at your destination, expects the trip to take 5.0 hours. When you arrive late, your excuse is that your car clock registered the passage of 5.0 hours but that you were driving fast and so your clock ran more slowly than your boss's clock. If your car clock actually did indicate a 5.0 hour trip, how much time passed on your boss's clock, which was at rest on the Earth?
A turntable must spin at 33.4 rpm (3.50 rad/s) to play an old-fashioned vinyl record. Determine how much torque must the motor deliver if the turntable is to reach its final angular speed in 1.0 revolution
As a baseball is being thrown, it goes from 0.0 to 40.0 m/s in 0.17 s. What is the acceleration of the baseball
What is the work done on the gas in Joules.
A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table. How far from the base of the table did it strike the floor
A transformer with a turns ratio (secondary:primary) of 1:80 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger?
A 55.0kg archer, standing on frictionless ice, shoots a 90.0g arrow at a speed of 50m/s. What is the recoil speed of the archer
A football player (m=115g) is sitting on the ground. A playerkicks the ball with a force of 36 N. The force acts over a distanceof 25 cm and is along the direction of motion of the soccerball. What is the speed of the ball after being kicked?
at a state fair a strongman claims to be able to throw a m100 g baseball straight up in the air ignore air resistance
1- a 1.8 mw helium-neon laser beam delivers a spot of light 8 mm in diameter across a room 17 m wide. the beam radiates
Two spheres are cut from a certain uniform rock. One has radius 4.70cm. The mass of the other is seven times greater. Find its radius.
Two balls are released simultaneously from the top of a tall building. Ball A simply dropped with no initial velocity, and Ball B is thrown downward with and initial velocity of 12 m/s.
An electron of the hydrogen atom makes a transition from the n= 5 level to the n = 2 level. The Rydberg constant is 1.097x 107/m. What is the wavelength of the photon emitted?
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