Question

4. The output energy of a good machine is always greater than input energy. 5. The ratio between the input energy to the output energy of a machine is called its efficiency. True or false
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Answer 1

Answer:

4.False

5.False

Explanation:

4.Output energy of every thing in this world always less than input.

5. Efficiency=output/input

   0r

   %Efficiency=output/input ×100

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