A pump supplies water to a corn field from a 50 meter deep water well. The system is the pump and the supply pipe. You may assume that water enters at low pressure, but leaves at high pressure and that the incoming piping is of much bigger diameter than the outgoing piping. You may also neglect heat losses from the pump. Determine which of the energy balance terms are not zero and, if so, their sign. E [Choose ] . 0 =0 [ Choose] AU or AH (depending on whether you are dealing with an open or a closed system) k [ Choose ] p [Choose ]