A particle with mass 1.65e-12 kilogram and electric charge -8.22e-8 C moves perpendicularly to a uniform magnetic field of strength 5.45e-3 T. The angular momentum of the particle about the center of its circular orbit is 3.20e-10 kg•m2/s.
(a) Evaluate the radius of the circular orbit?
in m
(b) Evaluate the speed of the particle?
in m/s