A capacitor stores 5.4 x 10-3 C of charge when connected to a 6.00-V battery. How much charge does the capacitor store when connected to a 9.0-V battery?

Two very small spheres are initially neutral and separated by a distance of 0.65 m. Suppose that 6.2 x 1013 electrons are removed from one sphere and placed on the other. What is the magnitude of the electrostatic force that acts on each sphere?


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