1. The problem statement, all variables and given/known data An alpha particle is moving at constant speed in a circle, perpendicular to a uniform magnetic field, making a revolution every 60 nanoseconds. Its speed is non-relativistic What is the numerical magnitude of the magnetic field in T ? 2. Relevant equations alpha particle (2 protons + 2 neutrons) We have here T= 2(pi)m / qB in which m=Mass (alpha particle= 6.64*10^-27) kg q=Charge = 2(1.6*10^-19) C T= (60*10^-9) s 3. The attempt at a solution This should be just plugging in, I got 2.1729, yet it is wrong... Why?