answer all three questions

Question 1 (35\%) A well-insulated, electrically heated tank for hot water contains 190kg of liquid water at 60C. Suddenly, a power outage occurs. If water is withdrawn from the tank at a steady rate of =0.2kg/s, how long will it take for the temperature of the water in the tank to drop from 60 to 35C ? Assume that cold water enters the tank at 10C and that heat losses from the tank are negligible. Over this relatively small range, we can assume that Cv. =Cp=C, for liquid water independent of T and P. Question 2(30%) Air at 1 bar and 25C enters a compressor at low velocity, discharges at 3 bar, and enters a nozzle in which it expands to a final velocity of 600m/s at the initial conditions of pressure and temperature (1bar,25C). If the work of compression is 240kJ/kg of air, how much heat must be removed during compression? Question 3(35%) Water at 90C is pumped from a storage tank at a rate of 3.0L/s. The motor for the pump supplies work at a rate of 1.5kW. The water goes through a heat exchanger, giving up heat at a rate of 670kW, and is delivered to a second storage tank at an elevation 15m above the first tank. What is the temperature of the water delivered to the second tank? Question 1 (35\%) A well-insulated, electrically heated tank for hot water contains 190kg of liquid water at 60C. Suddenly, a power outage occurs. If water is withdrawn from the tank at a steady rate of =0.2kg/s, how long will it take for the temperature of the water in the tank to drop from 60 to 35C ? Assume that cold water enters the tank at 10C and that heat losses from the tank are negligible. Over this relatively small range, we can assume that Cv. =Cp=C, for liquid water independent of T and P. Question 2(30%) Air at 1 bar and 25C enters a compressor at low velocity, discharges at 3 bar, and enters a nozzle in which it expands to a final velocity of 600m/s at the initial conditions of pressure and temperature (1bar,25C). If the work of compression is 240kJ/kg of air, how much heat must be removed during compression? Question 3(35%) Water at 90C is pumped from a storage tank at a rate of 3.0L/s. The motor for the pump supplies work at a rate of 1.5kW. The water goes through a heat exchanger, giving up heat at a rate of 670kW, and is delivered to a second storage tank at an elevation 15m above the first tank. What is the temperature of the water delivered to the second tank