What will be the linear momentum p, mass m, and kinetic energy EK of a particle with velocity of 1250 m s^-1 and wavelength of
828 x 10^-24 nm?

Does the behavior of this particle correspond to a macroscopic or
microscopic system? Justify your answer.

The de broglie relation says

putting in , , and we get:

The kinetic energy of the particle is

And the  linear momentum of the particle is

The wavelength of the particle is very small, in fact it is times smaller than the diameter of the proton; therefore, for all intents and purposes, the behavior of the particle is macroscopic.

their crystal patterns have been disrupted by stress