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Two spheres with uniform surface charge density, first with a radius of 7.2 cm and the second with a radius of 5.0 cm, are separated by a center-to-center distance of 33cm. The spheres have a combined charge of + 55uC and repel one another with a force of 0.75 N. Assume q1>q2.

What is the surface charge density on the first sphere?

What is the surface charge density on the second sphere?

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