Problem 4 A rectangular channel has a bottom width of 2.75 m. Compute the hydraulic radius when the fluid depth is 0.50 m. Free surface Problem 5 Calculate the force exerted on a stationary curved vane that deflects a 1-in-diameter stream of water through a 90 angle. The volume flow rate is 150 gal/min. (the density of water is p = 1.94 slugs/fts or 1.94 lb-52/ft4. Also, 1 ft3/s = 449 gal/min) Water jet Vane