See attached file for the diagram.
A proton source provides protons of various speeds. Protons of a particular speed follow the dotted line through the speed selector. The speed selector has an electric field of 3100 V/m and a magnetic field of 0.35T. The protons that the speed selector selects follow the dotted path.
a. The speed of the protons is: ____________________________________
b. The radius of the final path is: __________________________________
In four lines, the problems are answered.