Chemistry, asked by shirli11686, 1 month ago

How thermos flask keeps the liquids hot or cold?

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Answered by Anonymous

7

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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