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A balloon is filled with helium, which is less dense than the air around us. Because of this, it is able to float. But, over time, the helium leaves the balloon making it fall again.

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Q: How does a balloon rise against gravity?
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Does gravity force a hellium balloon to rise?

No, not directly ... it needs gravity to be present, but gravity alone won't do it. There's plenty of gravity on the moon, but a helium balloon won't rise there. A helium balloon floats in air, for exactly the same reason that a block of wood floats in water. Look up "Archimedes' Principle" and read about it.


Does gravity affect a hot air balloon?

Yes. Without gravity, a hot air balloon would rise infinitely. You could never return to the ground. Balloons tend to hover more or less. The force of the air pushing up on the balloon and the force of gravity pulling down on the balloon are usually very close to one another. This keeps the balloon at a steady height, unless you heat the air in the balloon, or let it cool.


Does a balloon filled with heleum depend on gravity?

I am not sure what you mean by 'depend' (please try and make your questions clear) but if you mean does the fact that a helium filled balloon will float (or rise) depend on gravity? Then the answer is Yes. if you were to take a helium filled balloon to the space station and release it inside, it would not rise, it would behave just the same as if you released a bunch of keys.


What force brings a hot air balloon to earth after the hot air is let out?

Erm.. no.. i believe its Buoyancy... this force causes u the hot air balloon to rise.. not Gravity..


How does gravity affect an aeroplane?

We measure it as a constant force pulling the plane toward the center of mass of the Earth, which usually coincides with the perpendicular to the ground. For simplicity, we call it "straight down".


Is gravity an element?

Yes, Gas does have a gravity. Gravity affects anything and everything that has a mass. But as the gravitational force is directly proportional to the mass, and since gases have a very very low mass, The force exists but is very low. If gases were not affected by gravity, the atmosphere would not exist!


What force acts against other forces?

Buoyancy is the power to float or rise in a liquid and it acts against the force of gravity.


Against what other force does buoyancy act?

Buoyancy is the power to float or rise in a liquid and it acts against the force of gravity.


Does gravity not affect on nitrogen balloon?

It does affect a nitrogen balloon.


If gravity is always pulling things down how does helium rise?

In a vacuum, a balloon with helium (for example) would also fall down. The point is that gravity pulls on the surrounding air with more force, because it is heavier; this pushes the balloon up. The situation is similar to a boat floating in water. The water displaces the boat - pushing it up precisely because of gravity.


Does gravity go inside of a balloon?

No. Air or helium goes inside the balloon.


What makes a balloon rise?

hydrogen