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To keep hot liquids hot and cold liquids cold by minimizing heat transfer between the inside of the thermos with the outside.
If you mix a hot liquid and a cold one, the heat from the hot liquid will flow to the cold liquid, reducing the heat of the overall liquid.
Depends on how much heat they loose and which gas (or mixture of gasses) they are. But yes, cool most gasses enough and they liquify (and then solidify if cold enough).
All material substances, including plastics of every type, can absorb heat to a greater or lesser degree (the measurement of heat absorbing ability is officially known as heat capacity). There are plastics that will melt if you heat them, but they still absorb heat, even as they melt.
some liquids can decompose when heated
A evaporator
Cold packs, for bruises are one invention.
conductor
Reflect
yes
jeans absorb liquids, such as water, soda, etc.. ice cold water can be absorbed by jeans but no, jeans do not absorb the cold air itself, jeans are cotton, which help hold heat, but not cold. I hope this answers your question. No, jeans don't absorb cold.
by inhibiting heat conduction
yes the ground takes in heat and cold
To keep hot liquids hot and cold liquids cold by minimizing heat transfer between the inside of the thermos with the outside.
conduction i think
NO because heat of cooler body is already low it is expected that it will absorb heat
refrigerators