Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: thedoc on 24/08/2011 13:14:45

Title: Why do coffee stains dry to leave a ring?
Post by: thedoc on 24/08/2011 13:14:45
Scientists from the University of Pennsylvania have discovered how coffee spills evaporate to leave hollow circular stains, and how to leave a uniform deposition instead.

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