The heat removal rate from a refrigerated space and the power input to the compressor are 7.2 kW and 1.8 kW, respectively. The coefficient of performance (COP) of the refrigerator is:

A refrigerator that consumes 3 kW of electricity when running and has a coefficient of performance of 1.5 is placed in a well-sealed room, and is plugged in with its door open. The rate of cooling or heating this refrigerator will provide to the air in the room when running isQuestion 8Select one:a.3 kJ/s, coolingb.4.5 kJ/s, coolingc.2 kJ/s, heatingd.4.5 kJ/s, heatinge.3 kJ/s, heating

An air-conditioner with an average COP of 2.5 consumes 15 kWh of electricity during a certain day. The amount of heat removed by this air-conditioner that day isQuestion 4Select one:a.23.5 MJb.54 MJc.21.6 MJd.135 MJe.6 MJ

A Heat Engine has a power output of 17.4 kW and rejects heat to a  heat sink at a rate of 2.69 MJ/minute. The Thermal Efficiency of this Engine is:Group of answer choices72%15%28.6%38.8%

he isentropic efficiency of a compressor is given by:Question 5Select one:a.the isentropic compressor work divided by the actual compressor workb.the actual compressor work minus the isentropic compressor workc.the isentropic compressor work minus the actual compressor workd.the actual compressor work divided by the isentropic compressor work

(e)     When the heater is supplied with 120 J of energy each second, the internal energy of theice increases by 45 J each second.Use the following equation to calculate the efficiency of the heater.