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Efficiency is ? A. The percentage of energy lost to the surrounding as heat. B. The percentage of energy that is actually used to perform work. C. The entire amount of energy. D. The time it takes for
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Efficiency is ?

A. The percentage of energy lost to the surrounding as heat.
B. The percentage of energy that is actually used to perform work.
C. The entire amount of energy.
D. The time it takes for half of the energy to be used.

User Tkerwood
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It is b) because you need to use your energy efficient for working

User Tim Ebenezer
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