Please someone explain this to me without refering to the concept of density!!!!!
2007-05-10 15:41:31 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
hot air rises, simple as that
2007-05-10 15:44:22 · answer #1 · answered by Mike A 1 · 0⤊ 1⤋
The Archimedian principle of bouyancy states that a bouyant object is subjected to an upward force equal to the weight of the surrounding medium that the object displaces. A hot air balloon is bouyant because the higher the temperature of a gas the less dense (fewer molecules per cubic volume) the gas will be.
Thus the hot air contained by the envelope of the balloon displaces more of the surrounding air than the weight of the balloon. This causes the balloon to be subjected to an upward force equal to the weight of the air it displaces.
For more information, do an internet search on "Archimedian principle." If you want to be really cool, try the library.
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I am very sorry to have to intrude on your fantasy, but it will not be possible for you to understand why a balloon rises without understanding the concept of density.
Either:
a) Become willing to understand reality on its own terms, or
b) Forget about understanding why a balloon rises.
One or the other...
2007-05-10 22:59:17 · answer #2 · answered by aviophage 7 · 0⤊ 0⤋
Pressure falls with altitude in the atmosphere.
So the pressure at the bottom of the balloon is higher than the pressure at the top.
Now here's the density bit - if the gas in the balloon has lower density than the air surrounding it then this pressure difference will lead to a force up that is larger than the weight of the balloon down.
And it rises.
2007-05-11 05:08:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Density is the cause so any answer that skips it is just messing with you.
Heated air expands so the air in the balloon has lower density than the unheated air around it. The lighter air makes the balloon go up.
Wind is not a cause of it rising. Water vapor is not a factor either.
2007-05-10 22:51:37 · answer #4 · answered by Rich Z 7 · 0⤊ 1⤋
Cold air holds more water vapor making it heavier, the air inside a balloon is heated making it lighter and therefore able to rise.
It has a lot to do with density but that is the simplest explanation.
2007-05-10 22:45:46 · answer #5 · answered by wittysmitty2513 1 · 0⤊ 2⤋
Intense heat makes the air molecules hyper-active. All the heated air gets pushed upward away from the source of heat. The balloon traps all this hot air and the force of the hot air moving upward in turn pushes the entire baloon with it. When there is no more heat or if the heat is lessened, the baloon will start decending.
2007-05-10 22:55:49 · answer #6 · answered by lsexybeastl 1 · 0⤊ 1⤋
the heat of the fire cause the hot air balloon. to rise because it is lighter than the overall air. and the wind helps to keep it up as well as the fire
2007-05-10 22:45:03 · answer #7 · answered by brianne 1 · 0⤊ 1⤋
hot air is lighter than regular air, like if you boil water the hotter water (vapors) rise to the top.
2007-05-10 22:44:53 · answer #8 · answered by andrea c 4 · 0⤊ 1⤋
Click on the link below to answer your question. Its a lot of paragraphs, but trust me, its worth reading in order to answer your question.
2007-05-10 22:51:00 · answer #9 · answered by Trumpet_dude 2 · 0⤊ 0⤋