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A CD has a playing time of 47.4 minutes. When the music starts, the CD is rotating at an angular speed of 512 revolutions per minute (rpm). At the end of the music, the CD is rotating at 206 rpm. Find the magnitude of the average angular acceleration of the CD. Express your answer in rad/s^2
Define a lie in the strict or formal sense and explain what is meant by communication - what is the principal purpose of communication?
A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 888 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore
Sisyphus was a character in Greek mythology that was doomed in Hades to push a boulder to the top of a steep mountain. When he reached the top, the boulder would slide back down the mountain and he would have to start all over again.
a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m.
The density of a sample of air is 1.205 kg/m3, and the bulk modulus is 1.42 105 N/m2, Find the temperature of the air sample
As the swimmer approached the Ontario shore, she encountered a cross current of 2 m/s [E 25 S]. Compute her velocity with respect to the crowd observing from the beach (with respect to the ground)
A 20.00kg sled is being pulled across a horzontal surface at a constant velocity. Determine the kinetic frictional force
A current of 0.500 A flows through an aluminum wire. The aluminum wire has a length of 2.00 m, what is the electron drift speed in the wire
A heat engine produces 12,000 W of power and operates at an efficiency of 21%. What is the heat input to the engine
Determine the specific heat capacity of an unknown sample of metal.
The maximum speed of a 2.5-kg mass attached to a spring is 0.55 m/s, and the maximum force exerted on the mass is 11 N. What is the amplitude of motion for this mass
Two rockets, A and B, approach the earth from opposite directions at speed 0.60c. What is the length of rocket A as measured by the crew of rocket B
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