how does the hot or cold liquid kept inside a thermos flask kept its temperature for long time
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Because it was covered with a layer of insulator
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We know that thermo flask is made up of insulator.
Thus, the substance kept in it get totally cut off from the surrounding and hence, have no interaction with surrounding temperature.
Hence, we can say that thermo flask is made up of insulator so it keeps hot or cold liquid inside it with its constant tempertaure for a long time.
Thus, the substance kept in it get totally cut off from the surrounding and hence, have no interaction with surrounding temperature.
Hence, we can say that thermo flask is made up of insulator so it keeps hot or cold liquid inside it with its constant tempertaure for a long time.
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