The is a comment section in the PLOS/1 format where a reader can submit corrections as required for evaluation by the author. Why not submit this proposed correction through this comment method.
On Fri, Jan 20, 2017 at 4:21 PM, <[email protected]> wrote: > 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 > >
