We propose to heat a house in the winter with a heat pump. the house is to be maintained at 20 c at all times. when the ambient temperature outside drops to -10 c, the rate at which heat lost from the house is estimated to be 25 kw. what is the minimum electrical power required to drive the heat pump?

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.