Question

please help! Find the mass flow rate of a water wheel if the power output is 25,000 Watts. Then find the efficiency.

Answer 1

we need the flow speed of the water to determine this.

Answer 2

actually, we would also need the efficiency as well or we'll have two unknowns. \[r=\frac{2P_{0}}{ev^2}\]where r is the mass flow rate, v is the flow speed, e is the efficiency and P_{0} is the power output (=25,000W).