1. What is the critical depth of flow for a trapezoidal channel with a bottom of 1.5 feet and 1.4 to 1 horizontal to vertical side slopes? The discharge is 9 cubic feet per second and the Manning number is 0.013 with a 3-foot drop over 1000 feet. Is the slope steep or mild?

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero