Part B Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 48 MW of electricity? This is a typical value for a small hydroelectric dam,

Part B Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 48 MW of electricity? This is a typical value for a small hydroelectric dam,

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 63AP: A roller-coaster car of mass 1.50 103 kg is initially at the top of a rise at point . It then moves...

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

Question

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In a hydroelectric dam, water falls 35 m and then
spins a turbine to generate electricity.
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▾ Part A
What is AU of 1.0 kg of water?
Express your answer with the appropriate units.
View Available Hint(s)
AU= -340 J
Y
Submit
▾ Part B
✓ Correct
SOLVE: The change in the potential energy of 1.0 kg of water in falling 35 m m is
H
Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of
water must pass through the turbines each second to generate 48 MW of electricity? This is a typical value for a small
hydroelectric dam.
Express your answer in kilograms per second.
▸ View Available Hint(s)
m
11s
AU, -mgh=-(1.0 kg) (9.8 m/s²) (35 m) = -340 J
=
=
Provide Feedback
Submit
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