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A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 502 Hz and has a speed of 27.0 m/s. The motorcycle has a speed of 13.0 m/s. What frequency does the motorcyclist hear?
A parallel beam of light with an energy flux S of 10 W/cm2 falls for 1 hour on a perfectly reflecting plane mirror of 1.0 cm2 area. what force acts on the mirror
2.50 kg block slides down the inclined plane at a 20.0degree angle as shown below. Calculte the work done by the force of friction
A spring hanging from the ceiling has an unstretched length of 80cm. What is the amplitude of the resulting oscillation
A cube of ice whose edges measure 21.0mm is floating in a glass of ice-cold water with one of its facesparallel to the water's surface. How far below the water surface is the bottom face of the block?
An AC voltage of the form ?v = 100 sin 1 000t, where ?v is in volts and t is in seconds, is applied to a series RLC circuit. Find the average power delivered to the circuit
Calculate the mean energy of an ideal gas of N = 2 identical bosons in equilibrium with a heat bath at temperature T
skater a mass 55.0 kg moving at 14.0 ms bumps into stationary skater b mass 65.0 kg. after the collision skater a moves
a car with a total mass of 1.92103 kg has wheels of radius 31.0 cm and moment of inertia 0.830 kg middot m2. what is
a 100 g cube of ice at 0 degrees c is dropped into 1.3 kg of water that was originally at 82 degrees c. what is the
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. determine the average pressure of the expanding gas
How many drops of water are in all the oceans on earth. Assume that 1cm^3 contains 25 drops of water.
In an effort to pump up you decide to hit the gym and lift weights everyday of the week. Your favorite lift, which you per- form every trip to the gym, is the bench press. This lift involves lifting a 125 lb.
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