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13 December, 05:33

reddit One company sells a defibrillator for home use that uses a 9-volt DC battery. The battery is rated at 4.2 A•hr (amp•hour). Roughly how much charge can the battery deliver?

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  1. 13 December, 05:43
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    V = 9v

    It = 4.2 A. hr

    E = 4.2*3600*9 = 136080 J

    q = E/V = 136080/9 = 15120 C
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