Water falling = how much power?

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Bigdane
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Water flows over a section of a waterfall at the rate of 3.2 104 kg/s and falls 33 m. How much power is generated by the falling water?
watts

i tried to use the power equation but I am just not sure how the numbers relate.
help please?
 
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use energy:

E[tex]_{gravitational}[/tex] before = E[tex]_{kinetic}[/tex] after

The gravitational energy of the water is turned into kinetic energy

the amount of power generated is the energy per second.