Question

Water flows (v approx. 0) over a dam at the rate of 660 kg/s and falls vertically 86 m before striking the turbine blades. Calculate the rate at which mechanical energy is transferred to the turbine blades, assuming 53% efficiency.

Answer 1

See post
http://www.jiskha.com/display.cgi?id=1286291156

Answer 2

thank you !