A pump steadily draws water at a mass flow rate of 20 lbm/s, through a piping arrangement. The pressure at the inlet 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.