i. Glass is a bad conductor of heat. ii. In a thermos flask, hot things remain hot and cold things become warm.

Question

Say whether true or false, correct and rewrite the false statement:

i. Glass is a bad conductor of heat.

ii. In a thermos flask, hot things remain hot and cold things become warm.

iii. Radiation of heat depends upon the colours of the outer surface of the body.

iv. During radiation, the particles of the medium vibrate.

v. Copper is better conductor of heat than iron.

Answer 1

i. True

ii. False. 

In a thermos flask, hot things remain hot and cold things remain cold.

iii. True

iv. True

v. True