How does a thermos know if you want the stuff inside to stay hot or cold????

Question

is there like temputure gauge in the lining or something?

Answer 1

It is meant to maintain it at the temperature the item is when you fill the thermos.

Answer 2

if u put it in hot itll stay hot cold im not sure

Answer 3

it stays at the temperature that the object is, so if I put iced coffee in, it would stay cold, but hot chocolate would be hot.

Answer 4

A thermos doesn't know how you want the stuff in it to be ... so, it just keeps it however you put it in .. if you put it in hot, the thermos keeps it hot. if you put it in cold, the thermos keeps it cold.

Answer 5

It doens't.  All it does is stop heat radiating in or out of the container, stops conduction in and out.

Therefore if you put something hot inside the thermos stops heat radiating and conducting out.

If you put something cold inside the thermos stops heat radiating and conducting in.

its the laws of thermodynamics which states heat will travel from a warm area to a colder area.  Therefore by stopping heat conduction you will keep something warm if it was warm already or cold if it were cold already.

Answer 6

like mama said, it just does.

Answer 7

Heat is a thermal energy. Air is a lousy conductor of thermal energy and a vacuum is even worse. Thermos type bottles have air or a vacuum trapped between the inner and outer linings, thus making it difficult for heat energy to move into or out of the material inside the container.

Answer 8

it works the same way as the walls in your home...it traps heat or cold within it, but it doesnt create either.