Why a thermos flask keeps hot liquid hot and cold liquid cold for a lo – InterviewSolution

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1.	Why a thermos flask keeps hot liquid hot and cold liquid cold for a long time
Answer» tion:The TECHNICAL NAME of a thermos is a vacuum FLASK (you will know the reason why, shortly). To keep your drinks hot or cold, it minimizes heat transfer due to conduction and RADIATION. Convection is not included because convection keeps the TEMPERATURE in a liquid even.

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