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13 September, 10:59

A person scuffing her feet on a wool rug on a dry day accumulates a net charge of - 70.1 uc. by how much does the mass of the person increase?

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  1. 13 September, 11:29
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    First, the charge of the electron e = - 1.602 x 10^-19 Net Charge Q = - 70.1 uC Mass of the electron m = 9.1 x 10^-31 kg Number of Electrons is net charge divided by electron charge N = - 70.1 / - 1.602 x 10^-19 = > N = 70.1 x 10^-6 / - 1.602 x 10^-19 N = 4.375 x 10^14 So calculating the increase in mass = N x mass of the electron, m = > N x m = 4.375 x 10^14 x 9.1 x 10^-31 = 39.8 x 10^-17
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