1.A ping-pong ball (diameter = 40mm, weight= .03 N Volume =4piR^3/3) is released from the bottom of a swimming pool. What is the terminal velocity of the ping pong ball in the water? Assume that Cd=.5. Determine if the drag coefficient is a good assumption based on the given charts.
2.For a 42-inch concrete stormwater pipe (n = 0.014), laid on a slope of 0.025%, carrying a flow rate of 10 cfs, what is the normal depth?