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Help with Coulombs Law

  1. Jan 23, 2012 #1
    1. The problem statement, all variables and given/known data

    What is the electric force between a glass ball that has +2.8 µC of charge and a rubber ball that has -4.8 µC of charge when they are separated by a distance of 4.5 cm?

    2. Relevant equations


    3. The attempt at a solution
  2. jcsd
  3. Jan 23, 2012 #2
    i got -59.7333 but it is wrong HELP please
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