February 20, 2017

Homework Help: Physics

Posted by Jonathan on Tuesday, February 16, 2010 at 6:49pm.

Initially, both metal spheres are neutral.
In a charging process, 1 × 1013 electrons are
removed from one metal sphere and placed on
a second sphere. Then the electrical poten-
tial energy associated with the two spheres is
found to be −0.061 J .
The Coulomb constant is 8.98755 ×
109 N · m2/C2 and the charge on an electron
is 1.6 × 10−19 C.
What is the distance between the two
Answer in units of m.

I KNOW r=Kcx q1xq2/PE

But I tried using the charge of an electron -1.6E-19 for both q1 and q2, yet I still get the incorrect answer...

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