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A helium balloon floats because helium gas is lighter than air. By filling a balloon with helium, the balloon also becomes lighter than air. The helium balloon floats for the same reason that objects float on water: objects less dense than water are pushed up by buoyant forces equal to the weight of water displaced by that object. What happens in water also happens in air, and the helium balloon is pushed upwards by a force equal to the weight of air it displaces.

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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 helium balloon float up when it is released?

A helium balloon floats up when released because helium is less dense than air. The helium inside the balloon is lighter than the surrounding air, causing it to create a buoyant force that pushes the balloon upward.


What makes an helium balloon go up and what makes an helium balloon go down?

a helium balloon is forced upward by buoyancy. a object is forced upward by a force equal to the weight of the fluid it displaces. this also applies to gases. the gas helium is lighter than average atmospheric air, that is that equal volumes of atmospheric air and helium do not weigh the same. This means that the volume displaced by the balloon is heavier than the balloon itself. since the air weighs more it applies more force upwards on the balloon than the balloon applies downwards on the air, therefore it rises. However, a helium balloon will not go down unless a force such as large air resistance (heavy wind etc.) is applied to it. hope this helps.


How do you use balloon in a example?

In a sentence? "He blew up the balloon with a tank of helium."


What is something that can go up quite easily but is harder to bring back down?

A helium balloon with no string.


How long does a balloon decompose?

When you let go of a balloon the air that is inside of it makes it fly up.It is impossible for it to go up to space.If its without helium then it takes about 6 days.


Why do balloons fly with helium and not with normal human oxygen?

because helium is lighter than air,therefore, when letting go of the balloon it will fly up


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.


What goes up when you let go of it?

More than likely a Helium filled balloon. A Hydrogen filled balloon is very flammable and might burst into flames similar to the Hindenburg blimp/dirigible. Helium is not flammable.


What happens to gas when it is put inside a balloon?

It depends what type of gas it is. With air inside a balloon will just stay still, will be easy to lift and when you kick it like a ball it will slowly go up and then come back down again. If you have helium in a balloon, the balloon will try to go to the highest point it can get, if you go outside and let go of a balloon it rise and go far above the clouds until the balloon starts to wear out so the helium starts to slowly come out so the balloon slowly comes down.


Why does helium filled balloon float up when it is released?

Because the helium is lighter then the sorrounding airBecause the balloon PLUS the gas in it weights less than the volume of air displaced by the balloon.


If gravity is always an attractive force between two objects why does a helium balloon fall up?

This is a really good question! Helium balloons 'fall' up because helium is lighter than air. In other words, even though gravity is pulling the balloon down, the helium is so light the balloon rises.