SuYungg1207 SuYungg1207

27-02-2024
Physics

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A 2.5 gram copper penny is given a charge of -2.010⁻9 C. How many excess electrons are in the penny?
a) 2.0 x 10⁹ electrons
b) 5.0 x 10⁹ electrons
c) 1.6 x 10¹0 electrons
d) 6.4 x 10¹0 electrons

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