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The ratio of electric to gravitational force between a proton and an electron is about what?
A2.4 × 1019
B2.4 × 1029
C2.4 × 1039
D2.4 × 109
Answer & Solution
Correct answer: C. 2.4 × 1039
k e2 divided by G me mp comes to roughly 2.4 × 1039, so electric force hugely dominates gravity at atomic scale.
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