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## Homework Statement

The potential energy of two atoms with a radius r is written as-

U(r)= -4Uo[(Ro/r)^12 -(Ro/r)^6]

Find the radius at stable equilibrium and the work required to separate the two atoms.

## Homework Equations

F(r) = -dU(r)/dr

## The Attempt at a Solution

If found the stable equilibrium using the F(r) equation and setting it to zero. I have NO idea how to find the work.

A nudge in the right direction would be nice.