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The ratio of useful energy output to total energy input is called energy .
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The ratio of useful energy output to total energy input is called energy .

User Plemarquand
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Energy efficiency maybe ?

User John Zabroski
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Answer:

Energy conversion efficiency

Step-by-step explanation:

Energy conversion efficiency (η) is the ratio between the useful output of an energy (benefit) and the total energy input (cost).

User Jude Niroshan
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