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When a person wearing a perfume enters a room

it takes a minute to spread in the room..what causes that??
9 years ago

Answers

bobpursley
Unless there is forced air circulation in the room.

Diffusion and Brownian motion is the answer. Perfume particles are large when compared to air particles. See this: https://www.youtube.com/watch?v=UC0bKzgQU9g
9 years ago

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