Answer: A refrigerator has a coefficient of performance of
Chapter 20, Problem 20.11(choose chapter or problem)
A refrigerator has a coefficient of performance of 2.25, runs on an input of 95 W of electrical power, and keeps its inside compartment at 5C. If you put a dozen 1.0-L plastic bottles of water at 31C into this refrigerator, how long will it take for them to be cooled down to 5C? (Ignore any heat that leaves the plastic.)
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