A pump steadily draws water at a mass flow rate at 20 lbm/s through a piping arrangment. At the pipe inlet, the pressure is 14.7 lbf/in^2, the temperature is 68 F, and the velocity is 10 ft/s. At the pipe exit, the pressure is 20 lbf/in^2, the temperature is 68 F, and the velocity is 40 ft/s. The exit is located 50 ft above the inlet. Determine the power required by the pump, in Btu/s and horsepower.