Question

How does a thermos flask prevent conduction convection and radiation?

Answer 1

Answer:

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Explanation:

The silver coating on the inner bottle presents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thickness of the glass walls stops heat entering or leaving the flask by conduction. The case surrounds the flask provides additional insulation.

Answer 2

Answer:

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Explanation:

A thermos flask has double walls, which are evacuated and the vacuum bottle is silvered on the inside. The vacuum between the two walls prevents heat being transferred from the inside to the outside by conduction and convection.

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