explain the working of thermal flask
Answers
A thermos is a bottle with a double-walled container inside of it. The air between the two walls is sucked out during construction, creating a vacuum.Heat that might otherwise transfer to the cold contents of the thermos is prevented from reaching it because of the vacuum between the thermos walls.
Explanation:
The gap between the two bottles represents the vacuum in a flask, which the heat can't travel through, preventing conduction. Finally the stopper on the top prevents convection, the movement of warm air out of the flask and cool air moving into the flask.
A thermos flask or a vacuum flask is used to keep a hot liquid hot and a cold liquid cold for a long time, by preventing the loss or gain of heat energy due to conduction, convection and radiation. ... The silvered outer surface of the inner wall is a bad radiator and hence it does not radiate heat.
Answer:
The vacuum prevents conduction. The tight stopper prevents in air from entering or leaving the flask, so convection isn't possible either.
When infrared radiation tries to leave the hot liquid, the reflective lining of the inner chamber reflects it straight back in again. There's virtually no way heat can escape from a vacuum flask and a hot drink stored inside will stay steaming hot for several hours.
Explanation:
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