A proton from a stationary state gains kinetic energy through an electric potential of 1.0 kV and enters a uniform magnetic field of strength 0.040 T. What is the radius of the orbit of the proton in cm? (To the nearest integer) (Proton mass mproton = 1.67 × 10-27 kg, proton charge e = 1.60 × 10-19 C)