Question: You have two marbles, one carrying a uniformly distributed charge (q_{mathrm{p}}=+1.0 mu mathrm{C}) and the other carrying a uniformly distributed charge (q_{mathrm{n}}=-0.50 mu mathrm{C}). (a)

You have two marbles, one carrying a uniformly distributed charge $q_{\mathrm{p}}=+1.0 \mu \mathrm{C}$ and the other carrying a uniformly distributed charge $q_{\mathrm{n}}=-0.50 \mu \mathrm{C}$.

(a) What is the magnitude of the electric force between them when they are held $100 \mathrm{~mm}$ apart?

(b) What happens when the marbles are released and so are free to move?

(c) If the marbles are metallic and share charge when they come in contact with each other, what is the magnitude of the electric force between them when they are again moved $100 \mathrm{~mm}$ apart, assuming no charge is transferred either to or from the surroundings of the two-marble system?

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