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How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?
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Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?
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An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.
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a stone is thrown horizonttaly from a cliff of a hill with an initial velocity of 30m/s it hits the...
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