A cyclotron is a device that can accelerate charged particles to very high velocities, and can be used to generate protons with

Question

A cyclotron is a device that can accelerate charged particles to very high velocities, and can be used to generate protons with radiative wavelengths that can kill cancer cells. What is the de Broglie wavelength of a proton (mass 1.673 x 10^-27 kg) that has been accelerated to a velocity of 1.35 x 10^4 m/s? 
2.93 x 10^-11 m 
5.35 x 10^-3 m 
3.41 x 10^10 m 
1.67 x 10^-10 m

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