Question

A hot air balloon rises up, because its density is more than air.

• A. True
• B. False

Answer 1

The correct option is B False

1. hot air rises up because it has a lesser density than the cooler air around it.
2. A hot-air balloon works on the principle of convection.
3. The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection.
4. It consists of a burner and a balloon envelope. When the burner is lit, it heats the air around it.
5. The hot air rises up and the cold air on the sides comes near the burner. The same process continues for a long time
6. The hot air gets trapped in the balloon and the hot air balloon rises, depending on the amount of hot air in it.

Hence, the given statement is false.