A heat pump is intended to maintain a room at TH=300K while the outdoor temperature is TC=280K. In one cycle it delivers 6000J of heat to the room using 1000J of electrical work.
(a) Calculate its actual COP.
(b) Calculate the maximum possible (Carnot) COP between these temperatures.
(c) Does the heat pump meet the requirement of being at least 60% of the Carnot COP? Support your answer numerically.