A balloon that is inflated, after a day, will become smaller in size due to .

That's a question. It depends on what grade you're in:

1.For elementary school students, the answer is: escape or, to put it more simply, air leak.

The gas can escape either from an unsealed mouth or from the balloon membrane itself.

The reason is, the pressure inside the balloon is higher than the pressure outside.

2.More professional:

Polymer functional film is a special film, which is mainly manifested in the selective permeability of certain substances.

It is often observed that a balloon filled with hydrogen will become smaller in size after a period of time due to the escape of gas, indicating that the rubber membrane that makes up the balloon allows hydrogen to pass through to a certain extent.

However, when the balloon is filled with nitrogen under the same conditions, the gas escape rate in the balloon is relatively slow, which indicates that the rubber membrane that constitutes the balloon has a discriminating effect on the permeation of different gases, and is a kind of gas selective permeation membrane.

Polymer functional membrane is such a film-type material with selective permeability ability, commonly known as separation membrane, which belongs to the category of functional polymer materials.

The molecules are moving irregularly, and it's probably just running out of the seal, like a normal balloon, and after a while, it's going to deflat, and it's coming out of the gas little by little, but at a slower rate.

Causes of pressure The pressure inside and outside the balloon is not the same. Causing the gas inside to leak like the outside.

The atmospheric pressure is stronger, and the atmospheric pressure is greater than the pressure of the gas in the sphere, and it is pressed out.

Air is made up of molecules, and molecules can move!

There is no such thing as an impermeable wall

Hehe, I guess it's a gas leak!

If two balloons are not the same size, the larger balloon will become larger and the smaller balloon will become smaller.

The bigger the balloon, the less force you need to inject the same amount of air into it.

The smaller the balloon, the more force is required to blow in the same amount of air.

This should be understood in combination with the actual life of life, and if you really want to explain the principle in a complex way, I have a low level and can't talk about it.

Therefore, when the valve between the two balloons is opened, the power of the gas of the big balloon cannot make the small balloon bigger, and the force of the air inside the small balloon can make the big balloon bigger, so the small balloon is deflated, and the big balloon is bigger.

Because when the red straw is released, the balloon also starts to shrink due to the contraction of the balloon's rubber film. However, when the balloon shrinks, the volume of air in the rest of the bottle increases, and the green tube is closed, so the air pressure in the bottle decreases - even lower than the pressure inside the balloon, and the balloon does not continue to shrink.

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What happens to a balloon when it rises in the air and why: If the volume of a balloon does not change, the height it can rise is affected by two factors: the density of the balloon with the air and the gravitational force on which the balloon is exerted.

When a balloon is inflated, the gas inside is thinner than the outside environment. As a result, the gas in the balloon is lighter than the external environment, like a thin air bag. Gravity is the reason why the balloon moves downwards, and if the gravitational force experienced by the balloon is less than the buoyancy of the balloon and the drag of the air, then the balloon will float up.

If the volume of the balloon does not change, the buoyancy does not change either. That is, the balloon is equal in volume ratio to air. However, if the air density is low, the buoyancy of the balloon decreases.

So, even if the volume of the balloon remains the same, when the balloon floats to a higher altitude, the buoyancy decreases, the drag decreases, so the balloon rises to a certain height and stabilizes at a certain height.

What happens if a balloon rises in the air and remains the same in size? And explain why.

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What happens to a balloon when it rises in the air and why: If the volume of a balloon does not change, the height it can rise is affected by two factors: the density of the balloon with the air and the gravitational force on which the balloon is exerted.

When a balloon is inflated, the gas inside is thinner than the outside environment. As a result, the gas in the balloon is lighter than the external environment, like a thin air bag. Gravity is the reason why the balloon moves downward, and if the gravitational force on the balloon is less than the buoyancy of the balloon and the resistance of the air, the balloon will rise.

If the volume of the balloon does not change, the buoyancy does not change either. That is, the balloon is equal to the volume of the air in proportion. However, if the air density is low, the buoyancy of the balloon decreases.

Therefore, even if the size of the balloon does not change, when the balloon floats to a higher altitude, the buoyancy will decrease, the drag will decrease, and the balloon will rise to a certain height and stabilize at a certain height.

Okay. Okay.

Is kissing your network?,I've already sent it<> I haven't seen it.。

Kiss hello <>

What happens to a balloon when it rises in the air and why: If the volume of a balloon does not change, the height it can rise is affected by two factors: the density of the balloon with the air and the gravitational force on which the balloon is exerted.

When a balloon is inflated, the gas inside is thinner than the outside environment. As a result, the gas in the balloon is lighter than the external environment, like a thin air bag. Gravity is the reason why the balloon moves downward, and if the gravitational force on the balloon is less than the buoyancy of the balloon and the resistance of the air, the balloon will rise.

If the volume of the balloon does not change, the buoyancy does not change either. That is, the balloon is equal to the volume of the air in proportion. However, if the air density is low, the buoyancy of the balloon decreases.

Therefore, even if the size of the balloon does not change, when the balloon floats to a higher altitude, the buoyancy will decrease, the drag will decrease, and the balloon will rise to a certain height and stabilize at a certain height.

This time, kiss

Gas molecules (particles) have a large distance between each other and are easily compressed. Therefore, the gas does not have a certain known volume and shape. The main factors that determine the volume of a gas are the number of particles that make up the gas and the distance between the particles.

If the gas is filled into the balloon, the final volume of the balloon is the volume of the gas it is filled with. At the same time, the larger the volume of the balloon, the more mass of gas needs to be filled. ）

Absolutely! In a general sense, isn't the volume of the balloon the coarse accumulation of gas body branches in the balloon! If you think of the volume of the balloon as the volume of the pin of the material used to make the balloon, I have to be speechless!

Balloons are filled with helium that is less dense than air, so their overall density is smaller than that of the surrounding air. The density of the air around the balloon decreases continuously during successive liftoffs, while the density of helium remains constant or decreases slightly. As a result, the density of the balloon is lower than that of the air and it exhibits lift before it can be lifted into the air.

In addition, as the balloon lifts off, the volume of gas inside the balloon keeps increasing, as the pressure dissipating circular force inside the balloon is much less than the external pressure. When the height of the balloon reaches a certain height, the density of helium decreases, and the space occupied by the volume of gas inside the balloon becomes larger little by little, which will cause the balloon to expand and reduce the pressure of the gas inside it. The density is small, the volume is large, and the internal pressure is reduced, which is the principle of the balloon that is constantly rising into the air.

When the temperature is constant, the smaller the volume of a certain mass of gas, the number of collisions between the gas and the container wall increases, and the pressure increases.

When the temperature rises and other conditions remain the same, the molecular movement can be accelerated, and the number of collisions between the gas and the container wall will increase, and the pressure will increase.

Because you just have to read the physics books yourself.

Balloon Air PressureWhen the balloon gets bigger, is the internal air pressure greater than the outside air pressure, or is the outside when the atmospheric pressure gets bigger, the balloon becomes deflated.

When the balloon gets bigger, the internal air pressure is greater than the outside air pressure.

The balloon changes because the air pressure inside and outside the balloon is different, and the change is to make the air pressure inside and outside the balloon equal, and the outside air pressure is the atmospheric pressure.

When the atmospheric pressure increases, the air pressure inside the balloon must also increase to balance the balloon, and the air pressure inside the balloon can increase by reducing the volume of gas in the balloon. So, the balloon will deflate.

On the contrary, if the balloon becomes larger, it means that the volume of gas in the balloon will increase, that is, the internal pressure will decrease, indicating that the internal air pressure is greater than the outside air pressure at this time.

During the balloon lift-off, only the position changes, and the mass of the gas in the balloon remains unchanged;

The atmospheric pressure decreases with the increase of altitude height, and the air pressure outside the balloon slows down in the process of balloon lift-off, in order to ensure that the internal and external pressure is equal, so the volume of the ball increases to reduce the pressure inside the ball, and the mass of the sail gas remains unchanged, and the larger the volume, the smaller the density

Therefore, d

A fully inflated balloon can be twisted into different shapes due to the fluidity of the air.

Air refers to the mixture of gases in the earth's atmosphere, so air belongs to the mixture, which is mainly composed of nitrogen.

Oxygen, noble gases.

Helium, neon, argon, krypton, xenon, radon), carbon dioxide.

and other substances (such as water vapor, impurities, etc.). Among them, the volume fraction of nitrogen is about 78%, the volume fraction of oxygen is about 21%, the volume fraction of noble gases (helium, neon, argon, krypton, xenon, radon) is about, the volume fraction of carbon dioxide is about annual data, and the volume fraction of other substances (such as water vapor, impurities, etc.) is about. The composition of air is not fixed, and the composition of air will change as the altitude changes, the air pressure changes.

But air was long thought to be a single substance, until later the French scientist Lavoisier.

Experiments first led to the conclusion that air is composed of oxygen and nitrogen. At the end of the 19th century, scientists discovered through a large number of experiments that there were rare gases such as helium, argon, and xenon in the air.

In a state of self-stupidity, the air is colorless and odorless.