My main question in order to solve this problem is...should kinetic energy be neglected? Ok, so here's the problem question: Sea water with a density of rho = 1025 (kg/m^3) flows through a pump of 0.21 (m^3/s). The pump inlet is 0.25 (m) in diameter. At the inlet the pressure is -0.15 (m of Mercury). The pump outlet is 0.152 (m) in diameter, is 1.8 (m) above the inlet. The outlet pressure is 175 (kPa). If the inlet and exit temperature are equal, how much power does the pump add to the fluid? So I've done an energy balance on the system (which would be the pump itself. Which I constructed to look like a U to account for the 1.8m distance). Thus, work is negative in this case because work is being done on the system. That said...I neglect internal energy changes because temperature is constant so I'm left with all things I know except for entering and exiting velocity of the fluid which is in the kinetic energy term for the energy balance. So...should I neglect kinetic energy? Because the temperature is the same at the inlet and the outlet and because it's a pump system?? Many thanks in advance!