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How can I show that the bulk modulus is about r^-4?

  1. Mar 5, 2017 #1
    1. The problem statement, all variables and given/known data
    Using the equations, show the bulk modulus is about r^-4.

    2. Relevant equations
    upload_2017-3-6_13-36-58.png

    3. The attempt at a solution

    Tried to plug Uij but it is not same as U. To be honest, I don't know where to start.
     
  2. jcsd
  3. Mar 9, 2017 #2

    Mapes

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    What values were you given for ##m## and ##n##? If you weren't given values, what pair potential have you discussed in class?

    What's the relationship between ##r## and ##\Omega##?
     
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