精选优质文档-倾情为你奉上1. Water is pumped at a constant velocity 1m/s from large reservoir resting on the floor to the open top of an absorption tower. The point of discharge is 4 meter above the floor, and the friction losses from the reservoir to the tower amount to 30 J/kg. At what height in the reservoir must the water level be kept if the pump can develop only60 J/kg?U1=0 W=60j/kg 2. The fluid (density 1200 kg/m3 ) is pumped at a constant rate 20 m3 /h from the large rese