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The Physics of Coffee Rings

(YouTube link)

This video shows us the strangely fascinating process behind the formation of coffee rings on a surface. As the water evaporates, the solid particles of coffee rush to the edges of the spill. The research was done by the University of Pennsylvania’s Department of Physics and Astronomy. Because we all know that scientists are obsessed with coffee. Read more about it at Open Culture. Link

Previously: The Physics of Spilled Coffee.

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