1. The problem statement, all variables and given/known data Suppose you want to observe neutron diffraction in a crystal with 0.27nm spacing between lattice planes. Part A asks for the momentum of neutrons with a wavelength equal to the spacing. I used p = h/lambda to get the correct answer 2.5×10−24kgms-1 Question1: Find the kinetic energy of neutrons having wavelength equal to this spacing. Question2: If these neutrons constituted an ideal gas, what would be the gas temperature? 2. Relevant equations Q1. k=0.5mv2 Q2. PV=nRT 3. The attempt at a solution Q1: I've tried a couple of different methods, dunno if i'm going the right way with this. k=0.5mv2 0.5(1.67*10^-27)(1.47*10^3)^2 = 1.80*10^-21J is this correct? Q2: I have no idea. Thanks in advance.