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100% of hydrogen is lighter than air
Hot air, hydrogen or helium are lighter than cold air.
Hydrogen and Helium are both lighter than air.
Greenhouse gasses are NOT "obviously lighter than air"; carbon dioxide is significantly heavier than air.One way to weigh something that's lighter than air is to weigh it in a vacuum.
Lighter air will rise; it is the same phenomenon as an air bubble rising in water.
A feather is very light, but theoretically cannot be lifted by something that is equally light or lighter.
The balloon is lighter than air.
100% of hydrogen is lighter than air
Yes methane is lighter than air because it is less dense than air.
No Argon is not lighter than air. Argon is 25% more dense than air.
Hot air, hydrogen or helium are lighter than cold air.
blimp or hot air balloons are lighter than air crafts
Hot air, hydrogen or helium are lighter than cold air.
Hydrogen and Helium are both lighter than air.
"Lighter than air." Think about it for a second.
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
Natural gas is lighter than air and rises.