Question

7. In a thermos flask, the silvering of the walls
prevents loss of heat by​

Answer 1

Answer:

The insulating material used between the glass vessel and the outer cover of the thermos flask prevents heat loss by conduction. The vacuum between the walls of the glass vessel reduces heat lost due to convection and conduction. The silvered walls of the glass vessel are poor radiators and good reflectors of heat.

Answer 2

Answer:

heat radiated is reflected by the silver walls to the inside of the vacuum bottle. The outer and inner walls have vacuum in between them which prevents heat transfer to outside either through conduction or convection. The shiny silvery surface prevents any gain or loss of heat through radiation.

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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