A domestic food freezer maintains a temperature of-15°C. The ambient air temperature is 30°C. If heat leaks into the freezer at the continuous rate of 1.75 kJ/s what is the least power necessary to pump this heat our continuously?

A tank of water has a shaft rotating at 60 rpm with a torque of 40 N-m that is stirring the water. A heater is also present that operates at 120V and draws 4A of current. Heat is then removed from the water such the total energy content of the water is constant. How much heat is removed?

A reversible heat pump absorbs heat at a temperature of 25.00oC and produces heat at 61.00oC, The work input rate is 110.00 kW, determine the heat input rate. the answer is 2490.16kW