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*Today we are going to come up with new task, that is about ”At what distance from the surface of the sphere is the electron’s speed half of its initial value?“. We have found the solution to this question, along with interesting information related to it, thanks to its novelty and interest. This is where we will focus to gain this useful and new knowledge!*

## Question: “At what distance from the surface of the sphere is the electron’s speed half of its initial value?”

A 2.4 mm -diameter sphere is charged to -4.6 nC . An electron fired directly at the sphere from far away comes to within 0.30 mm of the surface of the target before being reflected.*Part A*: What was the electron’s initial speed? Express your answer in meters per second.

*Part B*: At what distance from the surface of the sphere is the electron’s speed half of its initial value? Express your answer in meters.

*Part C*: What is the acceleration of the electron at its turning point? Express your answer in meters per second squared.

## Answer: “At what distance from the surface of the sphere is the electron’s speed half of its initial value?”

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