Section: Thermodynamics | Type: NAT | Marks: 2
An office uses a heat pump to receive 500 kJ/day heat in winter to maintain its temperature at 300 K. The ambient temperature is 280 K. If the COP of the heat pump is 60% of its theoretical maximum value, the ratio of actual work input to the minimum theoretical work input to the heat pump is ____________ (rounded off to one decimal place).
Answer: 1.6 to 1.8