1. The problem statement, all variables and given/known data Run-of-the-river projects harness power from the natural flow and elevation drop of a river. In the Brandywine project, water is diverted from the river into a pipe (r=0.75 m) in which it flows down the hill, through the turbine, and returns to the river. The project at Brandywine Creek produces 40,000 MWh of electricity per year (i.e., a mean power of 4.6 MW). The diverted water drops 280 m in elevation between where it leaves the river and where it reaches the turbines. Estimate the flow rate and speed of the water going into the turbine. 2. Relevant equations 3. The attempt at a solution Power: ΔP Q Power: 40000 MW/year x 1 year/365 days x 1 day /24 hr x 1 hr/3600 s= 169 MW/s Q= Velocity x Area = (pi (0.75m)^2/4) x 169 MW/s= 74.7 MW m/s x 1/ 4.6MW= 16.2 m/s I don't know what I just did. :S Please help.