Explain the construction and working of a thermos flask? – InterviewSolution

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1.	Explain the construction and working of a thermos flask?
Answer» It is constructed in such a way that heat loss due to conduction,convection and RADIATION is minimized. It is a double walled bottle of thin glass and the space between the walls is evacuated. The mouth of the bottle is closed by a cork or plastic stopper.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. Instead of CONTAINING some kind of heating element to keep hot things hot, a thermos is DESIGNED to keep hot things hot by not ALLOWING heat to escape.

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