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PHY

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. Four identical metal spheres have charges of qA = –8.0 µC, qB =–2.0 µC, qC = +5.0µ C, and qD = +12.0µ C.
(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 manner, which three spheres are brought together and then separated, if the final charge on each of the three is +3.0 µC?

  • PHY -

    (a) qB =–2.0 µC and qD = +12.0µ C.
    q=(- 2 + 12)/2 = 5 µC
    (b) qA = –8.0 µC, qC = +5.0µ C, and qD = +12.0µ C.
    q=(- 8 + 5+12)/3 = 9/3=3 µC

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