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Two metal plates are squares of 12 cm by 12 cm, separated by 1.0 mm of...

Two metal plates are squares of 12 cm by 12 cm, separated by 1.0 mm of air. Wires connected to each plate are also connected to a 9.0 V battery. A proton (charge +1.6 x 10-19 C, mass 1.67 x 10-27 kg) is launched away from the negative plate, toward the positive plate, with an initial speed of 250 m/s. Which plate does the proton hit first, and how long does it take to hit that plate?

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