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Diffusion of drug from a delivery tablet. Suppose a drug is encapsulated between two planes at...

Diffusion of drug from a delivery tablet. Suppose a drug is encapsulated between two planes at x = 0 and x = h. The drug diffuses out of both planes at a constant rate R, so the diffusion equation is, Dd2c =−R. dx2 (a) Solve for c(x) inside the tablet, subject to boundary conditions c(0) = c(h) = 0, that is, the drug is used up the instant it is released. (b) Compute the flux of the drug out of the tablet.

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