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An electron is fired horizontally at a velocity of 3.5 x 10" m/s in between two oppositely charged plates. The electron enters the system 2.0x10m from the bottom plate as shown below. The plates have a separation of 1.0 x 10"- m and a potential difference of 2.0 x 10-V across them. How far along does the electron travel horizontally before it collides with a plate? e 2.0x103 m