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Consider an electron on the surface of a uniformly charged sphere of radius 1.5 cm and total charge 1.5 10-15 C. What is the "escape speed" for this

Consider an electron on the surface of a uniformly charged sphere of radius 1.5 cm and total charge 1.5 10-15 C. What is the "escape speed" for this electron? That is, what initial speed must the electron have to reach an infinite distance from the sphere and have zero kinetic energy when it gets there?

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