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September 2, 2015

Homework Help: Physics!

Posted by Collin on Tuesday, February 7, 2012 at 5:43pm.

An electron orbits a 3.0 cm diameter metal ball 5.0 mm above the surface. The orbital period of the electron is l2.0 micro seconds. What is the charge on the metal ball?

I think I use E=kq/r*R but im unsure!
Please help!
Thanks

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