Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 3 m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.5 m away from a bulkhead. If the tension in the string is 2.5 N, what is the magnitude of q?  (ke = 8.99 × 109 N·m2/C2)

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 3 m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.5 m away from a bulkhead. If the tension in the string is 2.5 N, what is the magnitude of q?  (ke = 8.99 × 109 N·m2/C2)

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