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January 29, 2015

January 29, 2015

Posted by **Soraya** on Sunday, February 24, 2008 at 7:28pm.

Percent efficiency=

Work out (J)

_____________ x100

Work in (J)

- Math/Science -
**Damon**, Sunday, February 24, 2008 at 8:01pmThe electric motor that hauls our boats out of the water is 80% efficient.

the power out of the motor needed to haul the boat at .1 meter per second is 16 thousand Watts. How much power must go into the motor from the electric cable in the street?

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