1. The problem statement, all variables and given/known data In order for a neutron can exist in a nucleus, its wavelength must be smaller than the size of the nucleus (say 2 x 10-15 m) Use the uncertainty principle to calculate and show that a neutron would have a kinetic energy much smaller than its rest mass energy 2. Relevant equations ΔE Δt > h/4π 3. The attempt at a solution I had no clue in how to solve this problem. At first, I was thinking to solve for E, but figured that I don't know how to calculate for t. Can anyone help me with this question?