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Hard disc

{title2=$\mathcal A=\pi(R-2r)^2$}

A circular free-area model for a disc surrounded by fixed neighbours a centre-to-centre distance $R$ away. The inscribed circle available to the moving centre has radius $R-2r$. It is an approximation to the actual curved cage boundary, not the area of a disc whose radius is $R-r$.


Hard-disc cage approximation

Past exam of the chemistry course of the year 3 of the natural sciences course of the University of Cambridge / 2022 / Paper 3 / 48 / d / Solution

Past exam of the chemistry course of the year 3 of the natural sciences course of the University of Cambridge / 2022 / Paper 3 / 48 / e / Solution

Hard-disc cage approximation ( $A = π (R - 2 r)^{2}$ )

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Hard-disc cage approximation (A=π(R−2r)2)

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Hard-disc cage approximation ( $A = π (R - 2 r)^{2}$ )

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