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Homework Help: Work to move Electron & Nuetron

  1. Feb 21, 2007 #1
    1. The problem statement, all variables and given/known data
    A proton, an alpha particle, an electron, and a neutron are at rest at the corners of a square whose side length is 4.00×10^-10 m with the electron and neutron at opposite corners.

    How minimum an amount of work must be done to move the particles far from each other?

    2. Relevant equations

    Use 8.85×10^-12 F/m for the permittivity of free space and 1.60×10^-19 C for the charge on an electron.

    [tex] KE_{i} = PE_{f} [/tex]

    [tex] \frac {1} {2} * m_{p} * v_{i}^2 = \frac {1} {4*pi*8.85*10^{-12}} * \frac {Q^2} {R} [/tex]


    3. The attempt at a solution

    I'm not exactly sure what we're trying to solve for. I was wondering if someone could clarify the problem
     
  2. jcsd
  3. Feb 21, 2007 #2
    You do not have to consider K.E. here.
    THere are oppositely charged particles near each other. HOW much energy is required to seperate this configuration from the present state to a new state where al charges are inf. far away from each other.
     
  4. Feb 22, 2007 #3
    I'm a little confused, is there an equation I can follow?
     
  5. Feb 24, 2007 #4
    What equation can I start from to figure out this problem?
     
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