A proton has an initial speed of 33 x 105 ms what

Question

Solve the all parts of given problem:

Problem: A proton has an initial speed of 3.3 x 10⁵ m/s.

Part A: What potential difference is required to bring the proton to rest?

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Part B: What potential difference is required to reduce the initial speed of the proton by a factor of 2?

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Part C: What potential difference is required to reduce the initial kinetic energy of the proton by a factor of 2?

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This is a physic problem, reply as soon as possible. Thanks.