متن اصلی - انگلیسی - Now we consider the pump. The change in the...

Now we consider the pump. The change in the mechanical energy of water as it flows through the pump consists of the change in the flow energy only since the elevation difference across the pump and the change in the kinetic energy are negligible.Also, this change must be equal to the useful mechanical energy supplied by the pump,which is 13.7 kW: