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Force Is the Key to Granular State-shifting


February 15, 2013

granular material composed of photo-elastic disks Ever wonder why sand can both run through an hourglass like a liquid and be solid enough to support buildings? It's because granular materials--like sand or dirt--can change their behavior, or state. Researchers from North Carolina State University have found that the forces individual grains exert on one another is what most affects this transition. Full Story

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North Carolina State University

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