Apump steadily delivers water through a hose terminated by a nozzle. the exit of the nozzle has a diameter of 2.5 cm and is located 4 m above the pump inlet pipe, which has a diameter of 5.0 cm. the pressure is equal to 1 bar at both the inlet and the exit, and the temperature is constant at 20°c. the magnitude of the power input required by the pump is 8.6 kw. determine the mass flow rate delivered by the pump, in kg/s.