Because helium is less dense than air.
which gas is in ballons
The hot air balloons air pressure is usually used to explain the principle of buoyancy.
Non Helium ballons are just oxygen, or O2
Ballons's population is 86.
Air can escape from the ballons even if there aren't holes in them.
The area of Ballons is 17.23 square kilometers.
Ballons are made of an elastic plastic while a bottle in a harder plastic
Some examples are, hot air ballons, ships, bouys, actually just about anything that floats in air or water :p
it would be very hard to draw but if you draw 2 ballons one with air and one with no air then see which ones heavier it has to be the ballon filled with air
Most hot air ballons are made out of these fabrics because they have great weight to strength ratios.
Hot air ballons were invented in 19218237 a.d.If u read this post a commentif u dont then thats mean
Ballons