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Math Behind Growth Of 'Coffee Rings' Shown With Help From Penn Physicists
2013-01-18 14:43:58

University of Pennsylvania Last year, a team of University of Pennsylvania physicists showed how to undo the “coffee-ring effect,” a commonplace occurrence when drops of liquid with suspended particles dry, leaving a ring-shaped stain at the drop´s edges. Now the team is exploring how those particles stack up as they reach the drop´s edge, and they discovered that different particles make smoother or rougher deposition profiles at the drop edge depending on their...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.