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What force prevents a machine from having 100% efficiency? A. Magnetic B. Electric O C. Friction O D. Gravity ​
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What force prevents a machine from having 100% efficiency? A. Magnetic B. Electric O C. Friction O D. Gravity ​

User Cleo
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Answer:

I believe it would be C ? my apologies if I'm wrong.

User Mike Argyriou
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