1. Even when the refrigerator door is closed, a faulty light bulb inside the refrigerator is always switched on. What is the overall cost of power consumption for the complete refrigerator if the light bulb uses 20 W of power and the refrigerator has a COP of 1.4? Assume the cost of power is P12 per kWh. The refrigerator is opened for 30 seconds on average 15 times every day.

2.A heat pump uses a minimum of 2.5 kW of power. If the weather is nice outside, What should be done if the temperature drops to -3C while the home is kept at 25C? How much heat is lost each minute in your home?