Answer: A cooling unit for a new freezer has an inner
Chapter 20, Problem 20.75(choose chapter or problem)
A cooling unit for a new freezer has an inner surface area of6.0 m2, and is bounded by walls 12 cm thick with a thermalconductivity of 0.050 W/m-K. The inside must be kept at10C in a room that is at 20C. The motor for the coolingunit must run no more than 15% of the time. What is theminimum power requirement of the cooling motor?
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