In reply to Axil Axil's message of Thu, 19 Jan 2017 11:58:00 -0500: Hi, [snip] >http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0169895
I think Holmlid made a mistake in his velocity calculation. (Either that, or I did). He equates 500*MeV/u to 0.75 c. I think this derives from the formula:- (sqrt(500*MeV/u))/c = 0.733 which is close to 0.75 C. where u is the standard atomic mass unit. (i.e. mass of Carbon12 / 12). However I think the formula is incorrect, see the following derivation. From Einstein we get:- Kinetic energy (Ek) = p*c (where p is the momentum). p = m * v where m is relativistic mass, and v is the velocity. => Ek = m*v*c => Ek/m = v*c => Ek/(mc) = v 500 Mev /amu has the dimension of energy/unit mass, i.e. Ek/m, So 500 MeV / u = Ek/m = v*c => v = 500 MeV / (u*c) = 1.609E8 m/s or, as a fraction of c, 500 MeV / (u*c^2) = 0.537 (not 0.733) Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
