How much heat is needed to produce 13 J of energy from a heat en- gine with an efficiency of 0.3?

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 28P: A coal power plant consumes 100,000 kg of coal per hour and produces 500 MW of power. If the heat of...
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How much heat is needed to produce 13 J of energy from a heat en-
gine with an efficiency of 0.3?
A 3.9J
B
10 J
12.7J
D
43 J
Transcribed Image Text:How much heat is needed to produce 13 J of energy from a heat en- gine with an efficiency of 0.3? A 3.9J B 10 J 12.7J D 43 J
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