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What else can I help you with?
What is the other name for a vacuum flask?
A Thermos.
What do you call the object that keeps water hot for hours?
Thermos flask or vacuum flask.
Vacuum is mantained in thermos flask?
A vacuum is maintained in a thermos flask in order to prevent heat transfer by conduction and convection. The absence of air molecules in the vacuum reduces the amount of heat that can be transferred through these processes, helping to keep the contents of the flask hot or cold for longer periods of time.
The presence of -------------- in a thermos flask keeps the substances either hot or cold?
A vacuum is the answer.
How do you spell thermus?
The spelling is "thermos" (still a trademark name Thermos), a vacuum-insulated flask.
What the conduction in thermos flask?
Conduction in a thermos flask is minimized through the use of a vacuum layer between two walls of the flask. This vacuum layer prevents heat transfer by conduction, as there are no molecules present to transfer the heat. This helps to keep the contents of the flask hot or cold for an extended period of time.
Who create a thermos?
This is from wikipedia:The vacuum flask was invented by Scottish physicist and chemist Sir James Dewar in 1892 and is sometimes referred to as a Dewar flask after its inventor. The first vacuum flasks for commercial use were made in 1904 when a German company, Thermos GmbH, was formed. Thermos, their trademark for their flasks, remains a registered trademark in some countries but was declared a genericized trademark in the U.S. in 1963 as it is colloquially synonymous with vacuum flasks in general.
Who invented the thermos flask?
Ben hubberd Ben hubbardSir James Dewar invented the vacuum flask.
Why your vacuum flask cannot maintain the cold anymore?
There could be a crack or leakage that allows air to flow in or out of the flask. It may be time to replace the flask with a new one.
Why does a thermos flask have silvered glass and a vacuum?
A thermos flask has silvered glass to reduce heat transfer through radiation. The vacuum insulation minimizes heat transfer through conduction and convection, keeping the contents of the flask hot or cold for longer periods by preventing heat exchange with the surroundings.
Where was the thermos derived from?
The thermos was derived from the invention of a vacuum flask by Sir James Dewar in the 1890s. The vacuum insulation technology used in the thermos helps to keep liquids either hot or cold for extended periods of time.
How is conduction prevented in a thermos flask?
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.
