A thermal neutron has a speed v at temperature T = 300 K and kinetic energy m,v m = 3KT. Calculate its deBroglie wavelength. State whether a beam of these neutrons could be diffracted by a crystal, and why? (b) Use Heisenberg's Uncertainty principle to estimate the kinetic energy (in MeV) of a nucleon bound within a nucleus of radius 10-15 m.