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An electron moving with a speed of 7.40E+06 m./s. is shot parallel to an electric field...

An electron moving with a speed of 7.40E+06 m./s. is shot parallel to an electric field of strength 5.00E+03 N./C., arranged so as to retard its motion. How far (in meters) will the electron travel in the field before coming (momentarily) to rest?

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