Question

What is thermos flask?? ​

Answer 1

Explanation:

vacuum flask is an insulating storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. Invented by Sir James Dewar in 1892, the vacuum flask consists of two flasks, placed one within the other and j

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Answer 2

Answer:

Hey mate here is your answer

and vacuum flask is synonym of thermos flask

hope it helps you

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