Homework Help: Physics - Help!!!

Posted by Justin on Thursday, May 31, 2012 at 8:54pm.

I want to be sure I'm using the right formula for this question:
Calculate the electric force between 2 electrons that are 5.3 x 10^-11 m apart (electron charge = -1.6 x 10^-19 C)
I'm using the equation for Coulomb's Law: F = K (q1 q2)/d^2

(-1.6 x 10^-19)(-1.6 x 10^-19) /
5.3 x 10^-11 m ^2
Am I even on the right track???????

Physics - Help!!! - Damon, Thursday, May 31, 2012 at 9:00pm
You are on the right track but you left out k which is 9*10^9 and you must square the distance

(9*10^9)(-1.6 x 10^-19)(-1.6 x 10^-19) /
(5.3 x 10^-11)^2

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