Smart Dudes Take an Interest in Snowboards
Yeah, I know that doesn't seem possible.
http://physicsweb.org/articles/news/8/11/5/1 A train that runs on feathers 10 November 2004 What do trains, red blood cells and snowboarding have in common? More than you might think according to scientists who hope to develop a new type of train track based on lessons they have learned from the flow of blood through the body and experiments with a snowboarder. Sheldon Weinbaum and colleagues at the City College of New York claim that a track made of goose feathers is capable of supporting the weight of a moving train (Phys. Rev. Lett. 93 194501). ..... To measure the pressures that develop during snowboarding, Weinbaum and colleagues used a piston cylinder apparatus that was capable of reproducing the dynamic forces experienced by a moving snowboard (figure 1). They calculated that the air trapped in the snow can easily support the weight of a 70-kg snowboarder. They also found that the pore pressure underneath a snowboard with a surface area of 5000 square centimetres is about 1.4 kilopascals. ..... Phys. Rev. Lett. 93 194501 http://link.aps.org/abstract/PRL/v93/e194501 |
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