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Homework Statement In an experiment similar to Thomson's, charged particles are observed to travel through a magnetic field of 0.040T with a radius of curvature of 0.20m. The path of these particles is made straight again when an electric field is introduced by two parallel plates. The...

That was my problem, I hadn't realized that i had the different units. Thank you!

Homework Statement How fast would a proton have to travel to have the same momentum as a 6.0-MeV photon Homework Equations P= E / C The Attempt at a Solution P= E / C = 6.0-MeV / 3.00x108m/s