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A proton (m = 1.67 x 10-27 kg) travels a distance of 4.3 cm parallel to...

A proton (m = 1.67 x 10-27 kg) travels a distance of 4.3 cm parallel to a uniform electric field 2.3 x105 V/m between the plates shown in the figure. If the initial velocity is 1.9 x 105 m/s, find the magnitude of its final velocity in m/s. (* Ignore gravity)

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