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Scientists Crack The Physics Of Coffee Rings
You may have noticed that a spilled drop of coffee doesn't dry as a brown blob, but rather as a clear blob with a dark ring around the edge.Coffee, like many liquids, contains tiny, spherical particles . When a drop of the liquid dries, forces push the particles toward the edge, where they are deposited in a thick line.
You may have noticed that a spilled drop of coffee doesn't dry as a brown blob, but rather as a clear blob with a dark ring around the edge.Coffee, like many liquids, contains tiny, spherical particles . When a drop of the liquid dries, forces push the particles toward the edge, where they are deposited in a thick line.
Source: NPR
Posted on: Monday, Aug 22, 2011, 7:23am
Views: 1254
Posted on: Monday, Aug 22, 2011, 7:23am
Views: 1254
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