a. Determine the flow rate per unit width of a stream flowing down an inclined plane at an angle α to the horizon. The viscosity and density of the fluid are equal to η and ρ, respectively. The thickness of the stream is h. b. Estimate the slope of the bed of a channel 2 m deep, the average velocity of the water in which is 1 m/s. The viscosity of the water is 10−3 N ⋅ s/m2.