Question

1. In a thermo flask , heat loss due to conditions is prevented because

A. Glass and cork are poor conductors of heat
B. Conduction cannot take place in vacuum as it requires a medium
C. The stopper and the vacuum prevent Heat loss because of absence of air
D. The highly polished silver walls prevent heat loss​

Answer 1

Answer:

In a thermos flask, give reason for the following:

(a) A vacuum is created between the two walls of the glass bottle.

(b) The two walls of glass bottle are highly silvered on their vacuum side.

(c) The glass bottle is covered with a cork stopper.

(d) The glass bottle is placed in a plastic case by surrounding it with cork