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Brutus, a champion weightlifter, raises 240 kg of weights a distance of 2.70 m.
(a) How much work is done by Brutus lifting the weights?
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(b) How much work is done by Brutus holding the weights above his head?
(c) How much work is done by Brutus lowering them back to the ground?
A sealed 37 m3 tank is filled with 6000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. find The initial pressure of the gas
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