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

AI Thread Summary
The discussion focuses on demonstrating that the bulk modulus is approximately proportional to r^-4. Participants express confusion about the starting point for the solution and the necessary equations. There is a request for clarification on the values of m and n, as well as the pair potential discussed in class. Additionally, the relationship between r and Ω is questioned, indicating its relevance to the problem. Overall, the thread highlights the challenges faced in deriving the bulk modulus from the given equations.
joemmonster
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Homework Statement


Using the equations, show the bulk modulus is about r^-4.

Homework Equations


upload_2017-3-6_13-36-58.png


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.
 
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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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