Question
Explain, why a machine can not be 100% efficient?
✓
Answer
A machine can never be 100% efficient because:
(a) a part of the input is wasted in moving the parts of the machine.
(b) a part of the input is wasted in overcoming friction between the moving parts.
(a) a part of the input is wasted in moving the parts of the machine.
(b) a part of the input is wasted in overcoming friction between the moving parts.
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