How does a thermos know whether a drink should be hot or cold?
by 
KagomeShuko
ANSWERS: 8
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Crazy thoughts answer: A thermos is very intelligent, and can perceive through contact with a beverage whether to keep it hot or cold. Real answer: A thermos simply slows down heat transfer either to the liquid inside it (cold) or from the liquid inside it (hot); thereby, preserving the temperature of the liquid for long periods.
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I heard they are very smart by nature.
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It takes out it's little thermometer and checks if the drink has a fever.
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You yell in the thermos before you fill it " HOT "or "COLD" .so it knows how you want your drink kept. !
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its magical.
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It's just an insulator. It keeps whatever is in there at that temperature for a long time.
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"do it know"? : [) Well, first of all, it's not electrical. It's pure insulation. It keeps the temperature in if it's hot, cool, or even room temperature. d8=O<
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it usually has a computer chip and wifi connection to the mother thermos at the factory
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