Chapter 6, Problem 42QP

Protons can be accelerated to speeds near that of light in particle accelerators. Estimate the wavelength (in nm) of such a proton moving at $\text{2}{\text{.90×10}}^{\text{8}}\text{m/s (mass of a proton = 1}{\text{.673×10}}^{\text{-27}}\text{kg)}\text{.}$