42. (Ill) An electron moving to the right at 1.0% the
Chapter 16, Problem 42(choose chapter or problem)
42. (Ill) An electron moving to the right at 1.0% the speed of light enters a uniform electric field parallel to its direction of motion. If the electron is to be brought to rest in the space of 4.0 cm. (a) what direction is required for the electric field, and (b) what is the strength of the field?
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