An uncharged substance, X$,$ is placed at the origin of an infinitely long very thin tube, if X diffuses a root mean$-$square distance of $1$ um from the origin in $1$ ms$,$ how long will it take to diffuse a root mean$-$square distance of $100$ um from the origin?

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This question involves the concept of diffusion and more specifically the idea of root mean square d... View the full answer