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Imagine that the charges of an electron and a proton were of magnitude 4.2 × 10−19...

Imagine that the charges of an electron and a proton were of magnitude 4.2 × 10−19 C but of opposite signs. The electron and proton in a hydrogen atom are separated by a distance of 5 × 10−11 m and the value of Coulomb’s constant is 9 × 109 N·m2/C2.

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