A REALLY big balloon filled with helium! Really, it is less denser than air, and you can make any size if you work on it. Try to make one LOL.
feather
feather
A REALLY big balloon filled with helium! Really, it is less denser than air, and you can make any size if you work on it. Try to make one LOL.
No, the IPad Air is thinner and lighter than the iPad 4
maybe a cloud
A common riddle answer to "What is as big as a castle but lighter than air" is a cloud. Clouds can span vast areas and have a significant volume, yet they are composed mostly of water vapor and air, making them less dense than the surrounding atmosphere. Thus, they can appear large like a castle while being light enough to float in the sky.
With same mass, balloon get bigger with air than water because air is much lighter than water. With same standard volume, balloon get bigger with water than air because air is compressible and it will shrink down little bit from the pressure exerted by balloon wall.
Yes, ozone is lighter than air.
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
100% of hydrogen is lighter than air
Yes methane is lighter than air because it is less dense than air.
blimp or hot air balloons are lighter than air crafts