Part A of this problem demonstrates how to find the equilibriumseparation, and t

Question

Part A of this problem demonstrates how to find the equilibriumseparation, and to do so requires finding the first derivative ofthe Lennard-Jones potential U = (A/r^12) - (B/r^6).

The first derivative is given as (dU/dr) = (-12A/r^13) +(6B/ r^7). My professor has asked me to find the secondderivative of the potential at equilibrium position. So, I got(d^2U)/(dr^2) = (156A/r^14) - (42B/r^8). But my professor said itwas wrong. Does anybody see a blatant error anywhere? Did I deriveimproperly or did I misunderstand the question?

Explanation / Answer

i am sure that you are right. There is only one way to do and you get the right way. I don't know why your professor said that is wrong. I should say that mathmatically, you should be right!

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