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How long would it take a 7.5 KW motor to raise a 500 kg piano to an apartment window 10 meters above the ground?
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Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?
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Asmall grinding wheel has a moment of inertia of 4.0×10−5 kg⋅m2 . what net torque must be applied to the wheel for its angular acceleration to be 150 rad/s2 ?
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Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere
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How long would it take a 7.5 KW motor to raise a 500 kg piano to an apartment window 10
meters abo...
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