Water at 20 C flows from a reservoir out a 100 m long, 4 cm diameter galvanized iron pipe to the atomosphere. The outlet is 20 m below the surface of the reservoir. What is the exit velocity a) assuming no losses in the pipe and b) including losses? Assume the entrance has a square edge. Add a nozzle to problem (5) with a 2 cm diameter outlet. Calculate the exit velocity. The horizontal pipe is fitted with three standard screwed elbows equally spaced. Calculate the flow rate including all losses.