What is energy efficiency?
Energy Efficiency
Flashcard
•
Physics
•
9th - 12th Grade
•
Hard
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4 questions
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1.
FLASHCARD QUESTION
Front
Back
A comparison of how much energy is used to do work versus how much is lost or wasted to the environment.
2.
FLASHCARD QUESTION
Front
How is efficiency calculated?
Back
Efficiency = (Work Output / Work Input) × 100 %
3.
FLASHCARD QUESTION
Front
If a cyclist puts in 600 J of work and gets 140 J of useful work, what is the efficiency?
Back
Efficiency = (140 / 600) × 100 % = 23.3 %
4.
FLASHCARD QUESTION
Front
What is the maximum possible efficiency of any energy conversion?
Back
100% (but in reality, it is always less due to energy losses)
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