An electrostatic paint sprayer has a 0.200-mdiameter metal sphere at a potential of 25.0 kV that repels

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An electrostatic paint sprayer has a 0.200-mdiameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a grounded object.

(a) What charge is on the sphere?

(b) What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?

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