A heat pump is used to heat a building. The external temperature is lower than the internal temperature. The pump's coefficient of performance is 3.75, and the heat pump delivers 8.19 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? Number Units This answer has no units . (degrees) eTextbook and Media m kg S Save for Later Attempts: 0 of 3 used Submit Answer m/s m/s^2 N J W N/m kg.m/s or N.s N/m^2 or Pa K kg/m^3 g m/s^3 times