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A balloon filled with helium floats and a balloon filled with regular air falls to the ground because helium has less density than air so the air causes the balloon to sink because there are more molecules in it. The helium has less molecules in it so the balloon rises.

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13y ago

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Does helium float or sink in air at room temperature?

Helium is lighter than air. So it will float in air.


Does helium float or sink in water?

Helium gas is less dense than air, so it will rise and float in both air and water.


Why does a hot air balloon rise when it is heated and sink wen it is cooled?

If it is cooled its gets extremely cold from the helium,and when the heat is in the balloon it keeps it warm when its in the helium


Will a helium balloon rise in a house?

If the house is filled with regular air - yes. If it isn't, it'll depend on what gasses there is in the house.


Why does a helium balloon float in the air rathen than sink?

because helium is ligter than air


How does helium make a balloon rise when air doesn'?

Helium is lighter than air. So helium balloon rises in air.


Does helium rise?

yes honey, that's why hot air balloons rise


Does helium contract in cold weather and cause a helium balloon to sink and if warmed will it rise again?

Helium will contract in cold weather, but that may not cause a balloon filled with it to sink since the air will also contract - and by about the same amount - so the relative densities of the helium and the surrounding are would remain about the same and the buoyancy of a helium filled balloon would remain


Can you inflate a balloon without helium?

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Why does helium rise while carbon dioxide sink?

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Do farts rise or sink in the air?

Farts rise in the air because they are lighter than the surrounding air.


Why will a helium filled balloon will float in air?

A Helium filled baloon floats in air because Helium is lighter than air. Making it rise to the top of it.