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A vacuum flask keeps its contents warmer or cooler than the surrounding environment for a length of time. It consists of two flasks, one inside the other, that connect at the neck. The space between the two flasks is completely empty of air.
Why does the design of the vacuum flask minimize heat transfer by conduction?

Question

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A vacuum flask keeps its contents warmer or cooler than the surrounding environment for a length of time. It consists of two flasks, one inside the other, that connect at the neck. The space between the two flasks is completely empty of air.
Why does the design of the vacuum flask minimize heat transfer by conduction?

anonymous · Answer

Answer Choices:
1. One flask is smaller than the other flask.
2. One flask is more reflective than the other flask.
3. There is no air between the two flasks.
4. The two flasks do not touch each other, except at the neck.

Picture that goes with the question is attached.

anonymous · Answer

@hartnn  @zepdrix  @ash2326  @hba

rajat97 · Answer

heat transfer is just possible if there is some matter
heat gets transferred by the vibration of the molecules and the particles of matter
in a vaccum flask, there is no matter (lol) so ther are no molecules that vibrate and transfer energy(heat energy) so there is no change in the temperature

anonymous · Answer

I still don't get what the answer to the question is :(

anonymous · Answer

@ash2326  Can you help?

anonymous · Answer

@legacy_01

anonymous · Answer

@satellite73

anonymous · Answer

@travisbrown372

anonymous · Answer

its hard to try to explain but the last choice makes more sence

anonymous · Answer

Ok