CAUTION: This experiment uses dry ice (-109˚F) and liquid nitrogen (-321˚F). Proper safety equipment should always be used when handling these substances. Physics tells us that pressure, volume and temperature are all linked when talking about gases. So what does this have to do with solid carbon dioxide (dry ice) and liquid nitrogen? When dry
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I’ll be honest: This one blew me away the first time I saw it! What is going on here? It all has to do with polymers, which are basically long chains of repeated molecules, which you can learn more about here. Just to re-iterate: This is not dangerous to you, but it is dangerous to
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Nylon was patented on February 16, 1937 by Wallace Carothers. Almost exactly one year later, it hit the shelves in the form of toothbrush bristles. In the intervening years, it has been used for packaging food, building car engines, clothing, fishing line, 3D printing… it even went to the moon! But just what is this
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