Physics, 08.04.2020 17:31 lif3isanenigma

Mr. Cohen is a scientist who is testing the efficiency of a 9 V battery by measuring how much electrical energy it releases. He determines that 7 V of energy is converted to electrical energy. Which of these formulas shows how to calculate the efficiency of the battery?

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Mr. Cohen is a scientist who is testing the efficiency of a 9 V battery by measuring how much electr...