A proton is fired from far away toward the nucleus of an iron atom. Iron is element number 26, and the diameter of the nucleus is 9.0 fm. (1 fm = 10-15 m.) What initial speed does the proton need to just reach the surface of the nucleus? Assume the nucleus remains at rest.

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter20: Electric Potential And Capacitance
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A proton is fired from far away toward the nucleus of an iron atom. Iron is element number 26, and the diameter of the nucleus is 9.0 fm. (1 fm = 10-15 m.) What initial speed does the proton need to just reach the surface of the nucleus? Assume the nucleus remains at rest.

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