How far apart two protons be if the electrostaticforce exerted by one on the other is equal to weight ofthe electron??
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F=mg (it says in the task), where m is mass of electron and g is the gravitational acc. F=kQ2/r2 , where Q is the charge, r is the distance, k is constant Deriving, the expression for distance is: r2=kQ2/mg you should get that r = 5m
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