A small sphere with mass 900nbspmug and charge -430muc is, Ask an Expert

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A small sphere with mass 9.00 μg and charge -4.30μC is moving in a circular orbit around a stationary sphere that has charge +7.50μC.

If the speed of the small sphere is v = 5900 m/s , what is the radius of its orbit? Treat the spheres as point charges and ignore gravity.

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