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Unpolarized light passes through two Polaroid sheets. The axis of the first is vertical, and that of the second is at45.0° to the vertical. What fraction of the incident light is transmitted?
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. Explain how much force must you exert to keep the pole motionless in a horizontal position?
A ball initially at rest rolls without slipping down an inclined plane while a block slides without friction down an identical plane. Which arrives at the bottom with more kinetic energy
Compute the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.10 m above the ground.
A solid sphere (M=2.0 kg and R=0.5 m) is rolling without slipping on a horizontal surface at speed vcm=4.3 m/s, How high will it go on the incline before it rolls down
The loaded cab of an elevator has a mass of 3.6 x 10^3 kg and moves 193m up the shaft in 20s at constant speed. At what average rate does the force from the cable do work on the cab.
A 310kg wooden raft floats on a lake. When a 75kg man stands on the raft, it sinks 3.20cm deeper into the water. When he steps off, the raft vibrates for a while.
A slingshot will shoot a 10-g pebble 22.0 mstraight up. How much potential energy is stored in the slingshot's rubber band
A standing wave is set up in a 200-cm string fixed at both ends. The string vibrates in 5 distinct segments when driven by a 120-Hz source. What is the fundamental frequency for the string
Two 75 kg campers are in the middle of a creek in a 45 kg boatwithout a paddle. All they have on board the boat is a quantity of0.500 kg cans of beans.
At t=0, the displacement x(0) of a block attached to a spring is -850 cm. The block's velocity v(0) is then -.920m/s, what is the abgular frequency of this system
A 23.0-yr-old astronaut named Ashlin travels at speed .800c to a star 33.2 ly from Earth. Find the distance between Earth and the star in the astronaut's frame of reference
A 70.0 archer, standing on frictionless ice, shoots a 200arrow at a speed of 200. What is the recoil speed of the archer
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