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Why no machine is 100 efficiency?

Why no machine is 100 efficiency?
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3 votes
Why no machine is 100 efficiency?

asked
User Dirk Groeneveld
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7.6k points

2 Answers

3 votes
Because machines cannot be perfect. They are man-made, and mankind makes mistakes.
answered
User Bharath Kumar
by
8.2k points
5 votes
Energy can always be lost in the form of heat through friction.
answered
User Penta
by
8.1k points
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