Homework Help: Help! Physics!!

Posted by Melissa on Thursday, October 7, 2010 at 9:57am.

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 ??

Help! Physics!! - drwls, Thursday, October 7, 2010 at 10:58am
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

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