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The balloon may not look like there are no holes in it but it is covered in tiny holes small enough for air molecules to slip out one by through them. They will keep slipping out as long as the pressure in the balloon is higher than the pressure of the outside air.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoOne of the reasons why helium balloons go down so quickly is that the helium atom is VERY TINY - much smaller than oxygen molecules or nitrogen molecules. The helium atoms are tiny enough to leak right THROUGH the material of a latex balloon.
Silver "mylar" balloons hold in the helium much better, and stay inflated longer.
Wiki User
∙ 10y agoThere is no reason why it should float. Basically, they are denser than the surrounding air, so they drop down. The material of the balloon is denser than air, and the air compressed inside the balloon is slightly denser than the air outside.
Wiki User
∙ 15y agoBecause they have tiny leaks, the trapped gas inside is bound to leak out even if very slowly
Wiki User
∙ 15y agoweight of water
Wiki User
∙ 14y agobecause of helium gas
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Is helium suitable for blowing up balloons?
Yes, balloons filled with helium will be buoyant in air
Blows up like balloons when filled with air?
alveoli
How do you know hydrogen gas is lighter than air?
Balloons filled with it float in air
When balloons are filled with this they are lighter than air?
Hot air, hydrogen or helium are lighter than cold air.
Will carbon dioxide gas blow up balloons?
Yes. They'll drop like rocks (well, more like balloons filled with a heavier-than-air gas, actually), but it can certainly be used to blow them up.
Why do helium filled balloons float upwards but air filled balloons drop down?
bcoz helium is lighter than air
Is hot air balloons filled with helium?
No, it is filled with heated air.
What are hot air balloons filled with?
It is simply air that has been heated. Hence the namehot air balloons are filled with hot air from a propane tank
When balloons are filled with this they are lighter tha air?
Helium.
Why is air balloons filled with helium?
Because it is a safe gas that is less dense than air, thus balloons float in air
Is helium suitable for blowing up balloons?
Yes, balloons filled with helium will be buoyant in air
Blows up like balloons when filled with air?
alveoli
How air balloons float?
They are filled with hot air. The hot air raises and take the balloon with it
Why do helium-filled balloons float up in the air?
Helium is lighter than air.
Why will helium filled balloons float in the air?
Because helium is lighter than air.
How do you know hydrogen gas is lighter than air?
Balloons filled with it float in air
What source is used to fly hot air balloons?
Wind !... The balloons are filled with hot air, which causes them to rise. They are then at the mercy f the wind direction.
