"No machine is ideal" Why?
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Answer:
In ideal machines , all the input energy should be converted to output energy . But , some part of energy is always lost in overcoming friction and input energy is always greater than output energy . Hence , no machine is ideal.
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Explanation:
The period during which a machine is not being used. This is similar in effect to machine-down time though it may be caused by lack of work rather than by a fault in the machine.
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