Physics

HOw many electrons make up a charge of -30 micro coulombs???

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  1. a micro is 10^-6 or one millionth
    so we are talking about -30 *10^-6 coulombs

    the charge on the electron is -1.6 *10^-19 Coulombs

    so N electrons * (-1.6*10^-19 coulombs/1 electron) = -30 *10^-6 coulombs

    so N = 30 *10^-6 /1.6*10^-19

    that is (30/1.6) * 10^13
    which is (3/1.6) *10^14
    which is 1.875 * 10^14 electrons

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    posted by Damon

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