# Problem: Neutron diffraction is an important technique for determining the structures of molecules.Calculate the velocity of a neutron needed to achieve a wavelength of 1.35 Å . (Take the mass of the neutron m=1.674910-27kg).

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Neutron diffraction is an important technique for determining the structures of molecules.

Calculate the velocity of a neutron needed to achieve a wavelength of 1.35 Å . (Take the mass of the neutron m=1.674910-27kg).