Posted by Jose on Tuesday, January 25, 2011 at 5:52pm.
Let the two charges be Q1 and Q2
Q1 + Q2 = 277 µC
k*Q1*Q2 /R^2 = 20.8 Newtons
Two equations; two unknowns.
k is the Coulomb constant. Look it up if you need to.
R = 2.00 m
Take it from there; it's just algebra.
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