After being accelerated to a speed of 1.57105 , the particle enters a uniform magnetic field of strength 1.00 and travels in a circle of radius 32.

After being accelerated to a speed of 1.57×105 , the particle enters a uniform magnetic field of strength 1.00 and travels in a circle of radius 32.0 (determined by observing where it hits the screen as shown in the figure). The results of this experiment allow one to find .