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Show that you can only fit one isolated proton inside an ordinary coffee cup! [Hint: suppose...

Show that you can only fit one isolated proton inside an ordinary coffee cup! [Hint: suppose one proton is already sitting on the bottom. Then imagine another one above it at a distance h. The only forces acting on it are gravity and the force of the other proton. Solve for h and compare to the size of a coffee cup!]

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