IB Physics Quiz
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Two identical small conducting spheres carry charges of −2.0×10−9-2.0 \times 10^{-9} C and +6.0×10−9+6.0 \times 10^{-9} C. They are separated by a distance rr and exert an attractive force of magnitude F1F_1 on each other. The spheres are brought into contact and then returned to the same separation rr. What is the new force F2F_2 between them?
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