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## Homework Statement

The particle in a box model is often used to make rough estimates of ground state energies. Suppose that you have a neutron confined to a one-dimensional box of length equal say 1 x 10^-14m. What is the ground state energy of the confined neutron?

answer in MeV?

## Homework Equations

En = h^2/8mL^2

## The Attempt at a Solution

I am getting the wrong answer... I am getting:

(6.626e-34)^2/((8)(1.675e-27)(1e-14)^2) = 3.28e-13

That is wrong... anyone?