You are building a small hydroelectric generator for a hospital in a remote village. the hospital needs approximately 800 kWh/wk to run lights and two refrigerators to store its vaccines. You are planning on using a waterfall that is 65 m tall. write and simplify the energy balance for this system and calculate the required volumetric flow rate (in liters per second) in an ideal system (frictionless). how will the actual volumetric flow rate vary from your solution? why?