In December 2024
Answer to Question #340108 in Classical Mechanics for Andy
A beam of particles strikes a wall containing 2x10^29 nuclei per m^3. Each nucleus behaves like a sphere of radius 3x10^−15 m. Find the thickness of a wall that exactly half the particles will penetrate without scattering. What thickness would be needed to stop all but one particle in 10^6 ?
"d=\\frac{\\sqrt\\frac rn}2=6.1\\cdot 10^{-8}~m."
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#339914 on Dec 2023
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