Mechanical Energy Balance: Example Problems

Try to solve these problems before watching the solutions in the screencasts.

Example Problem 1

A 60-cm tall coffee urn is filled to the top. It dispenses coffee through a 0.7-cm diameter nozzle that is 12 cm above the table surface. How long does it take to pour a 200-mL cup of coffee?

Example Problem 2

Water flows through a 2.5-cm ID pipe at 115 L/min and 0.15-bar pressure. It vents vertically 1.0 m above the pipe. How high will the water shoot from the vent? Assume no frictional losses.