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# Answer to Question #3062 in Electromagnetism for asimomar

Question #3062
Find the magnitude of Coulomb force that exists between an electron and a proton in a hydrogen atom. <br>Compare the Coulomb force and gravitational force between two particles .
The two particles are separated approximately by 1&Aring; =10-10 m.

$F_c = \frac{Q_1Q_2}{4 \pi \varepsilon_0 R^2} = \frac{(1.602 \times 10^{-19})}{4 \pi (1/36\pi \times 10^{-9})(10^{-10})^2} \approx 2.3 \times 10^{-8}N \\ F_G = G \frac{m_em_p}{R^2} \approx 1.02 \times 10^{-47} N \\ F_C/F_G = 2.27 \times 10^{39}$

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