Socrates struggled and strained as he lifted an 82.0-kilogram mass vertically a distance of 3.00 meters in 5.0 minutes with a constant velocity. (a). How much work did he do?
(b). What was the average power consumption in watts?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.