Question

The vacuum between the two glass walls of the thermos flask considerably reduces the flow of heat by conduction or convection.
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Answer 1

Answer:

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Explanation:

The vacuum between the two glass walls of the thermos flask considerably reduces the flow of heat by conduction and convection. This is because both conduction and convection need molecules of a medium for transfer of heat. The silvered surfaces reflect the heat back, thus reducing radiation.

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