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Anything less dense than air (hydrogen, helium, hot air).
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∙ 8y ago
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What does density have to do with hot air balloons?
The burners on a hot air balloon create hot air, which rises into the balloon and displaces the cooler air from the balloon. Then the hot air, being less dense, will lift the balloon as the cooler surrounding air sinks below it. Once the air cools, the balloon will lose its lift and settle back to the ground. The hot air is only slightly less dense, so it requires a lot of volume to lift the comparatively smaller mass of the balloon and gondola.
How much hot air does it take to raise a hot air balloon?
No set answer to that, it depends on how much the balloon has to lift.
Why does a hot air balloon float even though it is so heavy?
Relatively hot air balloon are pretty light, and they have a very large balloon which is filled with hot air, which naturally rises, and if you contain enough of it it is enough to lift the balloon.
How does a balloon hovercraft work does it have lots of forces acting on it and what does friction have to do with it?
It has lift by having hot air, which rises. Gravity, Lift, and Friction act upon the balloon hovercraft. The friction is a fluid friction known as Air Resistance.
How do you make a balloon lift without helium?
There are actually a number of ways to make a balloon lift, without helium. Hydrogen is even less dense than helium (but has the disadvantage of also being highly flammable). And since hot air is less dense than cooler air, you can lift a balloon just by heating air. Since hot air is less expensive than either helium or hydrogen, that is a popular technique.
Why there are gases in the balloon?
To inflate the balloon. Whether the gas is helium or just air from your lungs, gases are needed to inflate the balloon.
Why do certain gases allow a balloon to rise?
Because the gases filling the balloon are lighter than the surrounding air.
What does density have to do with hot air balloons?
The burners on a hot air balloon create hot air, which rises into the balloon and displaces the cooler air from the balloon. Then the hot air, being less dense, will lift the balloon as the cooler surrounding air sinks below it. Once the air cools, the balloon will lose its lift and settle back to the ground. The hot air is only slightly less dense, so it requires a lot of volume to lift the comparatively smaller mass of the balloon and gondola.
Why does a hot air balloon fly?
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.
Why does a hot balloon fly?
A hot air balloon flies because it is filled with hot air. Hot air rises and causes the balloon to lift from the ground.
Why do noble gases in balloon float in air?
Noble gases are lighter than air. Hence balloons filled with noble gases will float in air.
Can a hot air balloon lift a car?
yes
Why is the size of balloon in the hot air balloon important?
Big enough to allow the hot air to create lift.
How much hot air does it take to raise a hot air balloon?
No set answer to that, it depends on how much the balloon has to lift.
Does a hot air balloon need CO2 to lift?
no, hot air air is used
Why does an air balloon float?
If you mean hot air balloon then it floats because hot air rises because it is less dense and with enough hot air caught in the balloon it can lift create enough lift to take off into the air. If you mean a helium balloon then it rises because helium in the balloon is less dense then the air around it. Since less dense things rise to the top the balloon will float.
Why does the hot air balloon come down?
Once the air cools, the balloon will lose its lift and settle back to the ground.
