What is lighter than a feather? The wind! Lighter than the wind? The spirit! Lighter than the spirit? The woman! Lighter than the woman? Nothing at all!
Because helium is lighter than air it is commonly used to fill airships, blimps and balloons. As it doesn't burn or react with other chemicals, helium is relatively safe to use for this purpose.
Airships and blimps are lighter than air and use buoyancy for flight. They are typically filled with gas (such as helium) that is less dense than the surrounding atmosphere.
Airships and blimps are lighter than air and use buoyancy for flight. They are typically filled with gas (such as helium) that is less dense than the surrounding atmosphere.
