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ubermuchlove

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## Homework Statement

The potential energy of a pair of hydrogen atoms separated by a large distance x is given by U(x)= -C6/x^6, where C6 is a positive constant. What is the force that one atom exerts on the other? Is this force attractive or repulsive?

## Homework Equations

## The Attempt at a Solution

I'm thinking we have to take the derivative of the equation??

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