2007-03-29 06:16:51 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
James Dewar
2007-03-29 06:21:43 · answer #1 · answered by *♥SwEeTy♥* 6 · 0⤊ 0⤋
Sir James Dewar, in the year 1892. It consists of a double-walled flask with a vacuum between the walls. The walls are silvered and heat cannot be conducted across a vacuum. They keep hot liquids hot because the heat cannot get out and cold liquids cold because heat cannot get in. After the liquid has been poured in, a cork stopper is used to seal the flask as cork is a very poor conductor of heat..
2007-03-29 13:19:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Sir James Dewar
2007-03-29 13:21:23 · answer #3 · answered by Coffeeman 1 · 0⤊ 0⤋
Go to answers.com at search of site type thermos flask choose the appropriate hint (vaccum bottle) you have all the details there.
2007-03-29 13:22:47 · answer #4 · answered by Richard J 6 · 0⤊ 0⤋
James Dewar.
The professional grade and laboratory grade "Thermoses" are called Dewar flasks.
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2007-03-29 13:21:13 · answer #5 · answered by tlbs101 7 · 0⤊ 0⤋