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A vertical cylinder closed from both ends is equipped with an easily moving piston dividing the volume in two parts, each containing 1 mole of air.In equilibrium at T=300K, the volume of the upper part is 4 times the volume in the lower part. At what temperature will this ratio be equal to 3.
A computer hard drive typically operates with a rotation speed of 7200 rpm (revolutions per minute).What is the angular acceleration of the drive
Two children are playing a game. The rst throws a basketball straight up, and the second tries to hit it with a thrown baseball. What is the angular impulse on the basketball
a physics professor demonstrates the doppler effect by tying a 600hz sound generator to a 1.0-m-long rop, what are the highest and lowest frequencies heard by a student in the classs room
Two forces, F? 1 and F? 2, act at a point. F? 1 has a magnitude of 8.20N and is directed at an angle of 62.0?, below the negative xaxis in the third quadrant What is the x component of the resultant force
For electrons in a metal, why is the density of states at the Fermi energy approximately equal to the density of free electrons divided by the Fermi energy
A 66 {rm kg} skier speeds down a trail, as shown in the figure . The surface is smooth and inclined at the angle of 22 ^circ with the horizontal. Find the magnitude of the net force acting on the skier.
A stroboscopic photo of a club hitting a golf ball, such as the photo shown in the figure below, was made by Harold Edgerton in 1933. find the average force exerted by the club on the ball
Consider the same situation, but now let the initial speed v_0 of first ball be given and treat the height h of the building as an unknown. What should the height of the building be for both balls to reach the ground at the equivalent time for v_0..
An electric motor rotating a workshop grinding wheel at a rate of 9.70 101 rev/min is switched off. How long does it take for the grinding wheel to stop
A spherically spreading EM wave has an average intensity of 570 mW/m2 at a point 9.5 m away from the source. What is the rms value of the electric field
A 108-g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 76°C. What is the final temperature of the water after the ice has melted
An astronaut travels to Mars with a speed of 8400 m/s. After 1 month (30.0 days) of travel, as measured by clocks on Earth, how much difference is there between the Earth clock and the spaceship clock? Give your answer in seconds.
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