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The nucleus of a 125Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. It has 54 protons and charge q=+54e (1 fm = 1 femtometer = 1×10^? 15m)
Hint: Treat the spherical nucleus as if it were a point charge by the entirety of the +54e charge at the center.
Another proton (which is not part of the Xenon nucleus) is placed a distance 1.0fm from the surface of the nucleus. What is the magnitude of the electric force on that other proton?
What is the proton's acceleration?
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Illustrates the difference between acceleration and velocity
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