Question

why warm air is lighter than cold air......Give accurate answer

Answer 1

it is not lighter but it has more kinetic energy for it easily facilitates motion hence it feels lighter, it has more kinetic energy because the more you heat the more energy is absorbed

Answer 2

Warm air molecules contain more heat energy, which causes them to move more rapidly. Rapid movements lead to more frequent collisions between molecules which causes the molecules to separate. Therefore there is more empty space between molecules in warmer air and the air is lighter.       Hope it helps Thanks..