/sci/ - Science & Math

>>11316325
>I understand that helium is lighter than gravity
False.
Helium balloons are kept aloft by buoyant forces similar to boats. The reason they float is because their weight is less than the buoyant force that acts on them. The weight is a function of density and volume of the object but the buoyant force is a function of the volume of the object and the density of the surrounding fluid. So as long as the object is less dense than the fluid it will float.