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supercooling |
Also found in: Wikipedia, Hutchinson | 0.06 sec. |
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supercooling [¦sü·pər′kül·iŋ] (thermodynamics) Cooling of a substance below the temperature at which a change of state would ordinarily take place without such a change of state occurring, for example, the cooling of a liquid below its freezing point without freezing taking place; this results in a metastable state. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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It is certain, however, that the amount of supercooled water increases as cloud temperatures increase due to the lack of ice nuclei present at warmer temperatures. It works as follows: high pressure lowers the temperature range of supercooled water from 233-273 K at atmospheric pressure to 183-251 K at 2100 bar so that the freezing water has a better chance to reach the glass transition temperature and be vitrified before ice crystals grow. The online edition of the Times of London reported last May that Peter Wadhams, a professor of ocean physics at Cambridge University, visited the Arctic ice cap on Royal Navy submarines and discovered "that one of the 'engines' driving the Gulf Stream--the sinking of supercooled water in the |
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