answersLogoWhite

0

Because helium is lighter than air. An object in a fluid is buoyed up by a force equal to the weight of the displaced fluid.

That's the reason that soap, logs, people, and boats float in water, and bags of hydrogen, hot air, or helium float in ordinary air.

User Avatar

Wiki User

12y ago

What else can I help you with?

Related Questions

What makes a child's balloon rise?

Helium. The helium gas in the balloon is lighter than the air outside the balloon.


What happen when a balloon is filled with helium?

When a balloon is filled with helium, it becomes buoyant because helium is lighter than the surrounding air. This causes the balloon to rise and float. The helium gas inside the balloon also increases the pressure, which helps the balloon maintain its shape and stay inflated.


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

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


Why does a balloon filled with helium rise with a balloon filled with an equal volume of average atmospheric air does not?

Helium is less dense than air, so a balloon filled with helium is lighter than the same volume of air. This buoyancy force allows the helium-filled balloon to rise. On the other hand, a balloon filled with air has the same density as the surrounding air, so there is no buoyant force to make it rise.


What gas makes a balloon rise into the air?

Helium. It is lighter than air and provides buoyancy, causing the balloon to rise.


Why can air balloon rise to the sky?

it can rise because of the helium and the gases help make it rise to the sky


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


Why do helium balloons rise in air?

The helium balloon rises in air because the density of helium inside the balloon is less than that of the surrounded air that is displaced by the balloons volume. So the balloon is lighter than the surrounding air. Ice cubes float in a glass of liquid water for the same reason.


Why does the balloon rise?

because it contains helium that is lighter than air


Why do you have to hang onto your helium balloon?

Helium is lighter than air, so it makes the balloon float. If you let go of the balloon, it will float up into the atmosphere because of the difference in density between the helium inside the balloon and the air outside.


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


Can you inflate a balloon without helium?

You can use air instead of helium, but it will not rise. The reason helium balloons rise is because helium is lighter than air. I am sure other gases can be used also.