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mustang

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Given: G=6.673*10^-11 N*m^2/kg^2.

If the gavitational force between the electron(9.61*10^-31kg) and the proton (1.59*10^-27kg)in a hydrogen atom is 1.2*10^-47 N,how far apart are the two particles? Answer in units of m. Note: I got 9.197872041*10^-11 by r = sqrt(6.673*10^-11*9.61*10^-31*1.59*10^-27/(1.2*10^-47)). Is the answer correct?