Question

Why do helium balloons float in air use the terms buoyancy and density?

Answer 1

Hot-air balloons and blimps can float in the air thanks to buoyancy, an upward force that the air exerts on them. The balloon must weigh less than the air it displaces (the air that would occupy the same space if the balloon wasn't there).

Answer 2

Hii

you are welcome in my and

The density of hilllium is less then air as it is lightest Gas as well as the property of fluid of buoyancy

the helium balloons float .

_____/\___☺️

Hope it may helps you✊✌️