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Homework Help: Electrostatic force problem?

  1. Dec 21, 2011 #1
    1. The problem statement, all variables and given/known data
    At the point of fission, a nucleus with 98 protons is divided into two smaller spheres, each with 49 protons and a radius of 6.38x10^-15 m. What is the repulsive force pushing these two spheres apart

    Hint: d ≠ the radius

    2. Relevant equations
    F= k (q1q2/d^2)

    3. The attempt at a solution
    if the radius isnt d then i dont know what is. i have tried multiplying the radius by 2 because there are now 2 spheres and setting it up like

    F= 9E9 (49 x 1.6E-19/4.76E-29^2) but that is incorrect
  2. jcsd
  3. Dec 21, 2011 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Makes sense to me.
    Redo this more carefully.
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