A trapezoidal channel with bottom width b = 5 ft and side slopes m = 2 (that is 2 horizontal over 1 vertical) carries Q = 100 cfs at depth y = 3.15 ft. The water temperature is 60 F, and the kinematic viscosity at this temperature is v = 1.217 * 10-5 ft2 /s.
(a) Determine if the flow is turbulent or laminar.
(b) Determine if the flow is subcritical or supercritical.