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Why does a helium balloon deflate? Why do Helium balloons rise?

۳ دی ۱۴۰۱
  • Why does a helium balloon rise?
  • What happens if we blow up a balloon and let it rise in the sky?
  • What is the gas that makes the balloon float?
  • Why does a helium balloon go down?
  • How high does a helium balloon go?
  • What type of gas causes the balloon to float?
The answer to these questions goes back to physics and has a completely scientific justification that we tried to explain to you in a very simple language. Perhaps it is a question for many people, what is the reason for the helium balloon to rise? Does it have no weight? So, what is the duty of the law of gravity in the middle? In order to investigate this issue, we must first familiarize ourselves with the two forces of gravity and buoyancy.

gravitational force:

This force between two bodies with mass is called gravity. All the objects on the planet have a downward force of mg.

Buoyancy force:

We have introduced the force of gravity and so far you might say that if there is gravity then why does a helium balloon rise? It should come down. This is where we have to introduce another force known as the buoyancy force. This force, which is also known as Archimedes force, states that if two fluids are placed next to each other, the fluid with lower density will enter as much as the buoyant force, which is equal to the product of density and acceleration of gravity in the volume of the fluid with lower density. It can. This force is calculated as follows: F=p*g*h The buoyant force is the same force that keeps the boat on the water.

The force between the balloon and the atmosphere

The gas that makes the balloon float is helium gas, this type of gas makes the balloon float, from a scientific point of view, because the density of helium gas is lower than air (in the same volume of air and gas helium, helium gas has less weight and somehow lighter), it goes up due to the force of buoyancy. That is, as a result of the difference in density between the two, a buoyant force enters upwards and the helium balloon rises.

How does a helium balloon float in the air?

As it was said, two upward forces enter the balloon, if the balloon is light and the buoyancy force is greater than the gravity force, the balloon will go up. But if it is less, it will go down instead of up. You must have noticed that the balloons that are filled with normal air slowly go down when we release them. Now, in order to better understand the reason why a helium balloon rises, it is better to mention this point here: the same helium balloon, which is known to rise and float, under certain conditions and with the type of gas that causes it to float, i.e. helium, can Do not go up and come down. When you fill the balloon with less amount of helium gas, the balloon becomes heavier than air and instead of going up, it will go down. So, in order to make the balloon float, you must put a sufficient amount of helium gas into the balloon.
Helium balloon rising
توضیح تصویر بالا: در این جا میزان وزن هر بادکنک به طور متوسط برای یک بادکنک با حجم ۱۶۰ گرم در نظر گرفته شده. لازم به ذکر است که وزن برای بادکنک های معمولی در حدود ۲۸ گرم بوده و نیز حجم ان ها با احتساب یک دایره به قطر ۸ اینچ محاسبه میشه.

What are the characteristics of the gas that makes the balloon float?

The gas that makes the balloon float is helium gas. Helium gas is a noble gas that never combines with oxygen and does not burn. Another reason for helium gas, in addition to floating the balloon, is not to burn it, because it greatly increases safety, that is, on a birthday when fire, candles, and fireworks are definitely used. If you want to know more about helium balloons and the price of helium gas and how to buy it, refer to the article on the price of helium gas. We prepared a community article about everything you need to know about helium gas and helium balloons

Why does a helium balloon go down?

Helium balloons are great for rising and floating, but do you expect helium balloons to take forever to float and never come down? You are very wrong. Even waiting to stay up for a week is a very vain expectation. But what is the reason that the helium balloon goes down after a while? It might be interesting for you to know that the body of balloons is full of very small holes. In the picture below, you can see a balloon under a microscope. All kinds of balloons have very small holes in the shape of pasta strings. Why does a helium balloon go down? These holes cause the gas in the balloon to be discharged after a while and at a very low speed, and as mentioned above, so much helium gas is released from the balloon that it becomes heavier than air and gradually come down
Of course, we need to say that the chemical structure of helium gas molecules, which are very small and separate, makes it easier for them to get out of the balloon holes than oxygen or nitrogen gas molecules, which are more stuck together. . This means that helium gas is discharged from the balloon earlier than normal air or nitrogen.

How high does a helium balloon go?

Helium balloons go up without limit and only bursting will stop them. A helium balloon bursts at a height of 10 km, which means that a helium balloon can rise up to about 10 km. If you want to know about buying helium gas, testing the quality of helium gas, its price, etc., be sure to visit the helium balloon article.

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  • Why does a helium balloon deflate