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Two small identical conducting spheres are 0.78 m apart. Sphere A has charge QA = -1.2 nC, and sphere B has charge QB = +2.4 nC. These spheres are briefly connected by a conducting wire, until equilibrium is reached. Now, both spheres have the same charge. Find the electrostatic force between the two spheres.
A. It has magnitude of 5.3x10⁻⁹ N and is repulsive.
B. It has magnitude of 4.2x10⁻⁹ N and is attractive.
C. The force is zero.
D. It has magnitude of 5.3x10⁻⁹ N and is attractive.
E. It has magnitude of 4.2*10⁻⁹ N and is repulsive.

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