Physics

Problem

Find the speed of a neutron (

m=1.67\times10^{-27}\,\text{kg}

) whose de Broglie wavelength is

0.10\,\text{nm}

. a)

4\times10^{4}\,\text{m s}^{-1}

4\times10^{3}\,\text{m s}^{-1}

4\times10^{5}\,\text{m s}^{-1}

4\times10^{2}\,\text{m s}^{-1}