# Physics

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An electron is projected, with an initial speed of v= 2.18e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial value? Express your answer in meters.

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See my answer to a similar question below under related questions.
The initial speed is different but the same equation can be used.

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Thanks

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