Consider the process shown below in which a submersible pump at the bottom of a reservoir operates at steady-state pumpin water at a rate m = 9.0 lb/s to an elevated storage tank. Heat transfer between the pump and its surroundings is negligible. The velocity and temperature of the water do not change significantly between the pump inlet and the storage inlet. The water may be assumed to be incompressible fluid with density p=1.9 lb/ft® and constant specific heat Cu = 1 Btu/lb°R. The distance are zu = 20 ft and 24 = 18 ft. The pressures in the storage tank is given by P2 = 25.9 psi and the atmospheric pressure is given by Patm 14.5 psi. Assume g = 32.2 ft/s^2 Required:
What is the pressure at the inlet of the pump?