Why do hot air balloons float?

How do hot air balloons float?

Use of hot air balloon in sports and metorological observation is an application of

Use of hot air ballon in meteorological observatory is an application of :

Why do we sweat ?

Connect with sports Air is not a pure substance. It helps us in many ways from breathing to playing. Balloon sports are a very popular sport. The basis of how the balloon works is that, hot air is lighter than cool air. which makes balloon rise up Find out more about Hot Air balloons.

Why do some objects float on the water and some sink ? (AS_(1))