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Two metal balls A and B of negligible radius, connected by a taut nonconducting thread of length 2.90 m, are floating at rest on Space Station Freedom between two metal bulkheads. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.38 m away from a bulkhead (a) If the tension in the string is 2.00 N, what is the magnitude of q? (Ignore any contribution from induced charge in the bulkheads.) (b) What happens to the system as time passes? Explain. (Assume the thread is oriented perpendicular to the bulkheads.)

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