why helium balloons fly away when we let it go of the string
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Our atmosphere contains about 78% Nitrogen gas and 21% Oxygen gas, with trace amounts of other gasses, including Helium which makes up about 1.3%. Both Nitrogen and Oxygen atoms have more mass than Helium atoms, so Helium will rise above them, similar to pouring oil into a container filled with water.
plz mark it as brainlist
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HEYA USER ,
HERE COMES YOUR A BRIEF DESCRIPTION OF YOUR QUESTION
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Firstly, the reason it floats up in the air is because helium is lighter than air. The balloon is pushing air out of the way that weighs more than the weight of the helium and the balloon together so the heavier air comes in underneath the balloon and the balloon is lifted up in the air. That's why the balloon goes up in the air and this process will carry on going until the helium filled balloon reaches a point or an altitude at which the air is the same density as the helium + balloon effectively is. That is the maximum height which defines how high it can go.
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As it floats higher and higher, the air pressure becomes lower and the temperature also drops. As the air pressure drops, the buoyancy will actually stay the same rather than go down. This is because the gas inside the balloon expands making the whole balloon expand. Since buoyancy is determined by the weight of the displaced air, even though the density of the air decreases, the expansion of the balloon still ends up displacing the same amount of outside air as it did at the lower altitude. The temperature will make the air around the balloon and also the gas inside the balloon more dense. So although the density of the surrounding air increases, the volume (and hence amount of air displaced) of the balloon decreases, thus maintaining the same weight displacement and keeping the buoyancy constant again (rather than having it go up).
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Eventually, however, the material of the balloon - typically latex - will either:
------↙️↙️↙️↙️
(a) Keep expanding and then not be able to expand any more. In this case, the balloon will displace a certain volume of air which won't change as the balloon continues to rise. Since the air above it is still continuing to drop in air pressure, eventually the static volume of the balloon will lead to decreased buoyancy (air gets thinner but volume of the balloon stays the same and so the same volume now displaces smaller weight of air) and the balloon will eventually come to rest at a maximum altitude where it's buoyancy and weight are equal.
-----------⬇️⬇️⬇️
(b) The balloon will expand so much that the gas that was trapped inside the balloon will start to escape. As the gas begins to escape, the amount the balloon can expand will peak and the balloon will again reach a maximum altitude.
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In either case, after quite some time, the gas will eventually leak out of the balloon and the balloon will slowly descend and fall back to the earth, deflated.
------------⬇️⬇️⬇️
I have read somewhere that the altitude record for an unmanned balloon is 50 KM
BE BRAINLY♥️♥️♥️♥️
HERE COMES YOUR A BRIEF DESCRIPTION OF YOUR QUESTION
----------------↕️↕️↕️↕️↕️↕️
Firstly, the reason it floats up in the air is because helium is lighter than air. The balloon is pushing air out of the way that weighs more than the weight of the helium and the balloon together so the heavier air comes in underneath the balloon and the balloon is lifted up in the air. That's why the balloon goes up in the air and this process will carry on going until the helium filled balloon reaches a point or an altitude at which the air is the same density as the helium + balloon effectively is. That is the maximum height which defines how high it can go.
-----------⬇️⬇️⬇️⬇️⬇️
As it floats higher and higher, the air pressure becomes lower and the temperature also drops. As the air pressure drops, the buoyancy will actually stay the same rather than go down. This is because the gas inside the balloon expands making the whole balloon expand. Since buoyancy is determined by the weight of the displaced air, even though the density of the air decreases, the expansion of the balloon still ends up displacing the same amount of outside air as it did at the lower altitude. The temperature will make the air around the balloon and also the gas inside the balloon more dense. So although the density of the surrounding air increases, the volume (and hence amount of air displaced) of the balloon decreases, thus maintaining the same weight displacement and keeping the buoyancy constant again (rather than having it go up).
---------⬇️⬇️⬇️⬇️
Eventually, however, the material of the balloon - typically latex - will either:
------↙️↙️↙️↙️
(a) Keep expanding and then not be able to expand any more. In this case, the balloon will displace a certain volume of air which won't change as the balloon continues to rise. Since the air above it is still continuing to drop in air pressure, eventually the static volume of the balloon will lead to decreased buoyancy (air gets thinner but volume of the balloon stays the same and so the same volume now displaces smaller weight of air) and the balloon will eventually come to rest at a maximum altitude where it's buoyancy and weight are equal.
-----------⬇️⬇️⬇️
(b) The balloon will expand so much that the gas that was trapped inside the balloon will start to escape. As the gas begins to escape, the amount the balloon can expand will peak and the balloon will again reach a maximum altitude.
--------------⬇️⬇️⬇️
In either case, after quite some time, the gas will eventually leak out of the balloon and the balloon will slowly descend and fall back to the earth, deflated.
------------⬇️⬇️⬇️
I have read somewhere that the altitude record for an unmanned balloon is 50 KM
BE BRAINLY♥️♥️♥️♥️
bhomeekkannancpdp7zj:
thank you u r the best
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bhomeek
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