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Question

What is the ratio of electrostatic force and gravitational force between a proton and electron at 1 nm distance?
Given mp=1.67×1027 kg, me=9.1×1031 kg, qp=1.6×1019 C

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Solution

|Fe||Fg|=(Kq1q2r2)(Gm1m2r2)=9×109×1.6×1019×1.6×10196.67×1011×9.1×1031×1.67×1027=2.2×1039

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