Steve, No difference that I can see. Unless, that is - that terminology is being used in a specialized way, and them it must be pre-defined for that usage. Otherwise, in both cases we are essentially talking about kinetic energy, and there should be no difference.
Jones -----Original Message----- From: Steven Krivit Jones, and how about ultra-low momentum neutrons? Steve At 03:34 PM 12/9/2009, you wrote: >Ultra-cold neutrons can move relatively far. With a lifetime of 886 >seconds, they could potentially move several miles before decay. > >Apparently, even at near absolute zero - they still achieve about the same >velocity as a human running fairly fast. > >Wiki sez: The kinetic energy of 300 neV corresponds to a maximum velocity >of 7.6 m/s or a minimum wavelength of 52 nm... and can be described as a >very thin ideal gas with a temperature of 3.5 mK. > >http://en.wikipedia.org/wiki/Ultracold_neutrons
