Question

The silvered walls of a vacuum flask enable heat transfer by : conduction and radiation, radiation only...... I think radiation only

Answer 1

Answer:

Vacuum in a vacuum flask prevents heat transfer through process of conduction and convection. It is so because, in conduction there needs a direct contact for transfer of heat and there is vaccum between two layers, so conduction can't transfer heat in this case.

Explanation:

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Answer 2

Answer:

radiation and conduction