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Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.139 N when their center-to-center separation is 69.5 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0371 N. Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge in coulombs on one of them and (b) the positive charge in coulombs on the other?

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