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A 4.2-cm -diameter isolated metal sphere carries - 1.5 C . (a) Find the potential at the sphere's surface. (b) If an electron were released

A 4.2-cm-diameter isolated metal sphere carries - 1.5 C. (a) Find the potential at the sphere's surface. (b) If an electron were released from rest at the surface, what would be its speed far from the sphere? Compare this speed to the speed of light: 3 x 108 m/s.

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