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.

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.
Express your answer using two significant figures.   P =       W  ??

drwls · Answer

Power out = (efficiency)*(mass flow rate)*(potential energy loss per mass) = 0.53*(660 kg/s)*(9.8 m/s^2)*(86 m) The answer will be in Watts