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A keg of beer is covered with a wet towel. Imagine that the keg gains energy from its surroundings at a rate of 20 W.
Part A
At what rate in grams per second must water evaporate from a towel placed over the keg to cool the keg at the same rate that energy is being absorbed?
Part B
How much water in grams is evaporated in 2.0 h?
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