At a hot air balloon festival, hot air balloons slowly fill and then rise majestically in the predawn sky. These hot air balloons fly because of two fundamental principles of physics: the ideal gas law and Archimedes's principle.
Magic...
Helium is lighter than air. so balloons filled with helium will float in air. warming will make them float or rise up faster.
Hot-air balloons can rise up into the air because hot air is lighter, allowing it to float up into the sky.
The balloons that float usually contain helium in them, which is lighter than air. This enables the balloon to float.
Helium is lighter than air.
Hot air balloons float because hot air displaces cool air in the atmosphere
Helium balloons float because helium gas is lighter than the surrounding air. This causes the balloon to be buoyant and rise up in the atmosphere.
Balloons float in the air because they are filled with a gas that is lighter than the surrounding air, such as helium or hot air. This creates a buoyant force that allows the balloon to rise and float.
Helium is lighter than air, hence it will rise up in air, making things float up in the air.
helium is less dense than air. :) so helium will float better than 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.
Balloons float in the air because they are filled with a gas that is lighter than the surrounding air. This gas, typically helium or hydrogen, creates buoyancy, causing the balloon to rise and float.