they are heavier than air hence why they don't fly unless in motion.
hot air balloon, jets, airplanes, etc.
only 10% of air china aircrafts fly to Chicago airport
-- blimp -- Zeppelin -- dirigible -- hot-air balloon
Classsification of aircrafs 1)lighter than air > hot air ballon > helium ballon > fixed wing ballon 2)Heavier than air >glider aircrafts 3)Air-breathing >aeroplanes >helicopters 4)Non-air breathing >rockets >misceles 5)Fixed wing >aeroplane >glider 6)Rottor wing >gyrodene >autoglider 7)Aerostat >advertisement ballons 8)Aerodyne >normal aircrafts 9)Monoplane >single-wing aircraft 10)Biplane >double or overlaped wings
Yes, ozone is lighter than air.
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
Some are heavier, but some are lighter. For example, methane rises but propane sinks.
100% of hydrogen is lighter than air
Yes methane is lighter than air because it is less dense than air.
Hot air, hydrogen or helium are lighter than cold air.
"Lighter than air." Think about it for a second.