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Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?
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The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?
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During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
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Calculate the kinetic energy of a 70 kg person moving at a speed of 5m/s...
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