A proton having an initial velocity of 22.7 Mm/s enters a uniform magnetic field of magnitude 0.320 T with a direction perpendicular to the proton's velocity. It leaves the field-filled region with velocity -22.7 Mm/s. (b) Determine the radius of curvature of the proton's path while in the field. m (c) Determine the distance the proton traveled in the field. m (d) Determine the time interval for which the proton is in the field. ns