Water flowing through a 2.1-cm-diameter pipe can fill a 400 L bathtub in 3.0 min . Part A What is the speed of the water in the pipe? Express your answer in meters per second.

The pressure at an opening in the side of a tank of water is 40 lb/in^2 greater than atmospheric pressure. What will the velocity of the water be as it leaves the opening?

2. For storimg purposes, water is to be moved from one pool to another that is 50 ft above the first one using a pump and an 8-in. inside-diameter pipe. The flow rate of the water is 2.5 ft’/s. There is a loss of available energy as 61 V²/2ft?/s² where Vis the average velocity of water inside the pipe. Determine the amount of shaft power required, in hp.

You and a friend plan to throw one end of a hose over a tall fence to siphon water from your side to the other side. Your friend says it doesn't matter how high the fence is, it will always work as long as your end of the hose is higher than the other side. However, you remind him that isn't actually true. What is the potential problem and about how high can the fence be (in meters) before it becomes an issue?