The momentum of a proton:

$\overline{){\mathbf{p}}{\mathbf{=}}\frac{\mathbf{m}\mathbf{v}}{\sqrt{\mathbf{1}\mathbf{-}{\displaystyle \raisebox{1ex}{${\mathit{v}}^{\mathbf{2}}$}\!\left/ \!\raisebox{-1ex}{${\mathbf{c}}^{\mathbf{2}}$}\right.}}}}$

Mass of a proton, m = 1.67 × 10^{-27} kg

A proton is accelerated to 0.999. What is the momentum of proton? And by what factor does the proton's momentum exceed its Newtonian momentum?

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