A physicist is designing a cyclotron to accelerate protons to one-tenth the speed of light. The magnetic field will have a strength of 1.5 T. Determine the rotational period of the circulating protons. Positive charge of a proton is 1.6 × 10 −19 C Mass of a proton is 1.67 × 10 −27 6.4 × 10^−8 s 8.4 × 10^−8 s 4.4 × 10^−8 s 2.4 × 10^−8 s