3. A 8 meter long smooth plastic garden hose with an inner diameter (id) of 20 mm is used to drain a wading pool as shown below. If the flow is inviscid, at what flow rate is water removed from the pool? 0.2 m 0.23 m

Liner Q2 ) Water flows at a rate of 2.0 ft/s in an old, rusty 6-in.- diameter pipe that has a relative roughness of 0.010. It is proposed that by inserting a smooth plastic liner with an inside diameter of 5 in. into the old pipe as shown in Figure, the pressure drop per mile can be reduced. Is it true that the lined pipe can carry the required 2.0 ft/s at a lower pressure drop than in the old pipe? Support your answer with appropriate calculations. 6 in. 5 in. Old New

It is desired to have a laminar flow for the piping system shown below. The fluid flowing in the piping system is air at 70 °C. (Note: You must use the physical data from Perry's Handbook) a) Calculate the maximum allowable bulk velocity in m/s for pipes 1, 2, and 3 that will satisfy the statement above. The velocities obtained must satisfy the continuity equation. b) Calculate the Reynolds number of each pipe using the velocity values obtained earlier. c) Calculate the mass flow rate of the system (in kg/min). 3. 2 12-in. pipe 2-in. pipe 3-in. pipe 1/2-in. pipe

A ventilation opening in a room is 2 feet by 3 feet.  Air flow out of the opening is measured at 75 feet per minute.  Calculate the CFM rate.