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Magnitude of force

  1. Mar 15, 2009 #1
    1. The problem statement, all variables and given/known data

    Two protons are 4.0 fm apart. ( 1 fm= 1 femtometer = 1*10^-15m)
    a)What is the magnitude of the electric force on one proton due to the other proton?
    b)What is the magnitude of the gravitational force on one proton due to the other proton?
    c)What is the ratio of the electric force to the gravitational force?

    2. Relevant equations

    F = Kq1q2/r^2

    3. The attempt at a solution

    I figured out the 1st part. F = 14 N

    but how do i start the 2nd part?
     
  2. jcsd
  3. Mar 15, 2009 #2

    LowlyPion

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