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For every 100 J of energy supplied to a motor, 80 J of useful
work is done. Calculate the efficiency of the motor. Give your
answer as a percentage.

Respuesta :

saadatk

Answer:

80%

Explanation:

efficiency = (useful work out / total energy in) x  100

                = [tex]\frac{80}{100}[/tex]  x 100

                =  80%

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