You have just returned from a long, cold day of fieldwork and are eager to take a nice hot bath. You start filling your bathtub then go to make a cup of tea and forget to put in the drain plug. If the volume of water needed for a bath is 0.30 m3 and the water flows in at a rate of 22 liters/minute and out the drain hole at 5 liters/minute, determine how long it will take to fill the tub to bath level. Density of water 1000 kg/m3

Water-to-water heat pumps are recently being employed to produce hot water, in-stead of gas water heaters. a water-to-water vapor compression heat pump cycle using 134-a as a working fluid operates between pressure limits of 200 kpa and 1600 kpa to produce hot water in winter. assume the isentropic efficiency of the compressor to be 85 percent determine the energy required to produce 100 gpm of hot water for 4000 hours of operation per year. what is the maximum temperature at which hot water can be produced? note: there should be at least 10°c of temperature difference between the water and the refrigerant fluid in the evaporator and condenser of the heat pump at inlet and exit of each device.