I'm trying to get my head around this question but having missed a few lecture through illness i'm going round in circles. Water is fed from a tank 12m above ground along a pipe 200 m long with a diameter of 125mm. Pipe frictyion factor is 0.008. K factors for the fittings, (tank exit, valve etc) add up to 3.3. I'm being asked to find the flow rate in kg/s and donlt knwo where to start. I don't want the answer, just some direction of how to approach it. Regards Sevy.