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a) An electron is moving east in a uniform electric field of 1.55N/C directed to the west. At point A, the velocity of the electron is 4.50 × 10⁵m/s pointed toward the east. What is the speed of the electron when it reaches point B, which is a distance of 0.395 m east of point A?

b) A proton is moving in the uniform electric field of part A. At point A, the velocity of the proton is 1.87×10⁴ m/s, again pointed towards the east. What is the speed of the proton at point B?

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