Question: An electron in a vacuum chamber is fired with a speed of 8300 km/s toward a large, uniformly charged plate 75 cm away. The electron

An electron in a vacuum chamber is fired with a speed of 8300 km/s toward a large, uniformly charged plate 75 cm away.
The electron reaches a closest distance of 15 cm before being repelled. What is the plate’s surface charge density?

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