Hot air balloons use hot air. They have a burner to heat the air. Hydrogen balloons were too dangerous because hydrogen is highly flammable, even static electricity could cause an explosion. Helium is safer because helium is not flammable.
helium is less dense than air. :) so helium will float better than air
Helium is lighter than air, hence it will rise up in air, making things fly.
Hot air, hydrogen or helium are lighter than cold air.
Helium balloons float in the air because helium is lighter than the surrounding air. This causes the balloon to be buoyant and rise upwards.
Helium is lighter than air.
Because helium is lighter than air.
Hydrogen, until the Hindenburg,then everyone realized that "Hey, Hydrogen isn't that safe to use!"Hot air balloons, you mean?? Just air that is hot.Actual hand balloons and such? Helium or again, just air. Helium floats better because it is lighter than the surrounding air around it. Helium and air are still used in both.
Helium is lighter than air, so a balloon filled with helium will float. In contrast, air-filled balloons will sink because the density of air is greater than that of helium. Additionally, helium balloons will deflate faster than air-filled balloons due to its smaller molecular size.
Helium is lighter than air. so balloons filled with helium will float in air
bcoz helium is lighter than air
because helium is lighter than air
In helium balloons and blimps. Helium is lighter than air. So balloons or blimps filled with helium will float or rise up