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Physics 11e (Cutnell) Ch. 18 #4

4. B GO Four identical metal spheres have charges of gA -8.0 HC, gs -2.0 IC, qc_ +5.0 pC, and q,-+12.0 μC. (a) Two of the spheres are brought together so they touch, and then they are separated. Which spheres are they, if the final charge on each one is +5.0 μC? (b) In a similar man- ner, which three spheres are brought together and then separated, if the final charge on each of the three is +3.0 μC? (c) The final charge on each of the three separated spheres in part (b) is +3.0 uC. How many electrons would have to be added to one of these spheres to make it electrically neutral?

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2 15HC Caince inal chage on each sphere ist54. Charje on combined ephere will be lowG, which means Sphere B u) omd sphere 1p(c

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