an electric water heater is used to heat water from a supply circulating at 10" c. the heating level of the heater is set to maximum while several people take showers in succession. if, at maximum level, the heater uses 5 kw of electricity per second, and the shower water flows continuously at 8 1/min, what is the temperature of the water leaving the heater? it is assumed that the temperature of the water in the heater is always the same (steady state) and that the heater is 100% efficient (it is perfectly insulated and all the energy is used to heat the water)