Posted by hashi on Friday, November 26, 2010 at 6:21am.
Use F=ma to find the weight of an electron, use a=9.8 m/s^2
use coulombs law
F=k(Q1Q2)/r^2
rearrange to
r^2=k(Q1Q2)/F
use k=8.99 x 10^9 N m^2/C^2
and Q1=Q2=1.60x10^-19 C
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