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Capillary action on paper towel above saltwater and freshwater

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Uploaded on Feb 14, 2012

Two strips of paper towel were hung above a cup of freshwater and a cup of saltwater, respectively. Water diffused to a higher level in both strips but the evaporation was weaker on the paper towel strip above the saltwater, suggesting the diffusion of ions to the paper towel as well.

Watch a video of these two paper towel strips after more than ten hours: http://www.youtube.com/watch?v=ybk5ev...

Visit http://energy.concord.org/ir for more.

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