Question

A thermos flask prevents loss or gain of heat by
(a) conduction only (b) convection only
(c) radiation only (d) all the above.

Answer 1

thermos flask prevents loss or gain of heat by
conduction, Convection and radiation.

so the answer is option 'd' all of the above

Answer 2

Answer:

(d) all the above.

A thermos flask prevents loss or gain of heat by radiation, convection, and conduction.

Explanation:

The flask is made to stop heat loss by radiation, convection, and conduction. To lessen radiation emissions, the inside glass walls have a silver coating. The glass walls' vacuum stops heat loss through conduction and convection. This will stop convection from occurring. To address conduct. The outside body of a thermos uses fewer heat-conducting materials, such as plastic, foam, etc. to prevent conduction. Conduction is prevented even in the vacuum. The heat is reflected back towards the liquid by the aluminum foil, which acts as the inner chamber's reflective lining to stop radiation. The space between the two bottles symbolizes the vacuum in a flask, which prevents conduction by preventing heat from passing through.