## Spu-mance

Good thing the diffusion constant was not provided, so no one will be calculating anything.

Diffusion is the change in concentration over the change in time. It is a random walk, and very slow process.

For 3-dimensions, on average, r^2 (the distance) = 6Dt, where D is the diffusion constant.

For 2 dimensions, r^2 = 4Dt

and for just one dimension, r^2 = 2Dt.

Usually gusts of wind are needed for that cologne to travel across the room.

Advertisements