Topic: Thermos Flasks
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Answers to Common Questions
How does a Thermos Flask Work?
A thermos flask works by having two walls with an empty space in between. Both walls are normally made out of a material that doesn't transfer heat well. Because of this the liquid stays hot, or cold, while the outside wall and the air in b... Read More »
Source: http://answers.ask.com/Home/Other/how_does_a_thermos_flask_work
How to Make a Thermos Flask
If the thought of a lukewarm drink makes you shiver but the price of an insulated flask makes you burn with anger, creating your own insulated flask is a great option to keep your favorite drink cold for extended periods of time. Assembling... Read More »
Source: http://www.ehow.com/how_7836190_make-thermos-flask.html
What is the principle of a thermos flask?
If you call it by its correct name "vacuum flask" the principle becomes clear. The flask consists of an inner and outer chamber, the space between the chambers is a vacuum. A vacuum cannot conduct heat, hence no losses between the two chamb... Read More »
Source: http://wiki.answers.com/Q/What_is_the_principle_of_a_thermos_flas...
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Thermos Flasks
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Answers to Other Common Questions
Ben hubberd Ben hubbard Sir James Dewar invented the vacuum flask. Note: There are comments associated with this question. See the discussion page to add to the conversation.
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Source: http://wiki.answers.com/Q/Who_invented_thermo_flasks
it was made in 1892 by ben hebberd by sarah wood bexhill
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Source: http://wiki.answers.com/Q/When_was_the_thermo_flask_invented
James Dewar invented the Thermos flask in 1892. He was a scientist at Oxford University in England. The name Thermos comes from the Greek word therme, which means heat. Commercial production of the flask began in 1904. References: Thermos L...
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Source: http://www.answerbag.com/q_view/2212477
There are many ways this is done. It can be done by having a double walled thermos with either air, an insulator, or a vacuum between. A vacuum will prevent all conduction except where the two walls touch but requires stronger materials.
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Source: http://wiki.answers.com/Q/How_is_conduction_prevented_in_a_thermo...
The thermos flask is basically two flasks, one in side the other, in between the two flasks a vacuum is produced. Convection requires a liquid or a gas to transfer heat, therefore it can't happen in a vacuum.
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Source: http://wiki.answers.com/Q/How_is_convection_prevented_in_thermos_...
because it keeps insulation and it keeps your food warm and btw wiki answers is crap dnt look at it lol!!
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Source: http://wiki.answers.com/Q/Why_is_the_thermos_flask_a_great_invent...
