Physics 62 Special Relativity (38 of 43) Relativistic Sample Problem - Cosmic Radiation

In this video I will find v=?, t=? (for it travel across a galaxy 1 light-year across), gamma=? of a proton.

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[ggiiuulliio]

calculation of time measured by the proton gives 1.6 min or 100 sec following your reasoning.

I believe you used the wrong number for the number of seconds in 1 yr. I think it is something like 3*10^7

[itzdakhiz]

how to calculate for electron kinetic energy??