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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 .
Expert's answer
The two particles are separated approximately by 1&Aring; =10-10 m.

/cgi-bin/mimetex.cgi?F_c%20=%20%5Cfrac%7BQ_1Q_2%7D%7B4%20%5Cpi%20%5Cvarepsilon_0%20R%5E2%7D%20=%20%5Cfrac%7B%281.602%20%5Ctimes%2010%5E%7B-19%7D%29%7D%7B4%20%5Cpi%20%281/36%5Cpi%20%5Ctimes%2010%5E%7B-9%7D%29%2810%5E%7B-10%7D%29%5E2%7D%20%5Capprox%202.3%20%5Ctimes%2010%5E%7B-8%7DN%20%5C%5C%20F_G%20=%20G%20%5Cfrac%7Bm_em_p%7D%7BR%5E2%7D%20%5Capprox%201.02%20%5Ctimes%2010%5E%7B-47%7D%20N%20%5C%5C%20F_C/F_G%20=%202.27%20%5Ctimes%2010%5E%7B39%7D

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