Water

enters a pump at 350 kPa at a rate of 1 kg/s. The water leaving the pump enters

a turbine in which the pressure is reduced and electricity is produced. The

shaft power input to the pump is 1 kW and the shaft power output from the

turbine is 1 kW. Bothe the pump and turbine are 90 percent efficient. If the

elevation and velocity of the water remain constant throughout the flow and the

irreversible head loss is 1 m, the pressure of water at the turbine exit is