Question

how does a hot air balloon rise?

Answer 1

Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot-air balloons and blimps stay in the air. A hot air balloon uses a burner to heat up the airinside the balloon.

Answer 2

When the heated air raised the balloonthe brothers cut the ropes. The air balloon approximately in 10 minutesrose to the height of 1000 meters. ... After ten minutes as the air in the casing cooled, the balloon landed in a field and caught fire from the flame smouldering in the basket
I hope you help