일반물리학 1 — Entropy and the Second Law of Thermodynamics: Problem 29

29 A heat pump is used to heat a building. The external temperature is less than the internal temperature. The pump’s coefficient of performance is 3.30, and the heat pump delivers 7.54 MJ as heat to the building each hour. If the heat pump is a Carnot engine working in reverse, at what rate must work be done to run it?