13. Pump Power. A pump delivers water (1.94 slug ft3) at a steady rate of 300gpm (gallon per minute). Upstream pressure (at D1=3.5-in diameter) is 18 psi; and downstream pressure (at D2=1-in diameter) is 60 psi. Elevation difference across the pump is negligible (z1z2). The rise in internal energy of water associated with a temperature rise across the pump is 3000ftlbf/slug (irreversible loss). If the process is considered to be adiabatic (no heat transfer), determine the power supplied by the pump. [1 gallon =77/576ft3;1hp=550ftlbf/s.] Ans. 32 hp