1.The flowrate in a rectangular channel is 20 m3/s. The width of the channel is 4 m and the depth of flow is 5 m. If there is an increase in the channel bottom elevation (?z) with NO energy loss, what is the maximum value of ?z possible with no increase in upstream flow depth?
2.A baseball is a perfect sphere with a diameter of 0.1 m. A ball player throws this baseball at 100 miles per hour (mph) in standard air. ? air = 1.20 kg/m3 ? air = 1.51 x 10-5 m2/s 1 m/s = 2.237 mph (a) Find the Reynolds number for the motion of this baseball through air. (b) Determine the drag force on the baseball under these conditions in N.