dj3728764 dj3728764

03-11-2020
Chemistry

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A painter needs to buy a new pulley system. Both systems have an input work of 100 J, but the old system model has an output work of 60 J and the new system model has an output work of 75 J.

Which system is more efficient?

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unicorns231 unicorns231

04-11-2020

The answer is the old model is better

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