Question

2. How does coffee remain hot in a thermos flask?

Answer 1

Answer:

Since there is a vacuum between the inner and outer walls of the bottle, the flow of heat by convection becomes redundant. Finally, the silvering of the walls ensures that the heat is not lost by radiation. As a result, the liquid kept in a thermos flask continues to maintain its heat levels.

Answer 2

Answer:

Since there is a vacuum between the inner and outer walls of the bottle, the flow of heat by convection becomes redundant. Finally, the silvering of the walls ensures that the heat is not lost by radiation. As a result, the liquid kept in a thermos flask continues to maintain its heat levels.

Explanation:

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