there is a tree in a planet in space with no atmosphere but with gravity, if a

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Arif N

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tree fell dose it make a niose? before you answer this question please consider this:
1. sound is defined as vibrations that travel thought the air.
2. People believe that (Oxygen) is need to make a sound but but what about other types of gases.
3. people say that there is no air in space but doesn't every thing have to have matter in it to take up space. so if there is a a bag with no air of any kind in it, it would be tightly compact.
4. so if there is air it would travel but there is no one there.
5. is the tree making the sound or the object the tree hits
please think about the question carefully:

Note: i am neutral for this question this is why i want to hear what you have to say.
 
There is sucjh things as dark matter and everything has to have matter dark matter is all in outr universe there is no oxyegn or gravity but there is dark matter

So it woulsd make a noise but it would be VERY faint
 
2 is incorrect. people don't believe its just oxygen. any gas, liquid or soild (matter) works

3 space has helium and hydrogren in it (about 10,000 atoms per sq cm)

this extra spacing, reduced the speed of sound and effectivly its pitch or freq,
 
The tree falling can ONLY make sound if there is a medium though which the vibrations can travel. Since your ear won't be the thing the tree falls onto (I would hope) you won't hear anything unless you shoot enough gas or liquid at it that the vibrations can travel from its source to your ear.
 
Air is a mixture of gases (i.e. oxygen, carbon dioxide, etc.) An atmosphere is any gas. Sound needs to travel through a medium, be it solid or gas. So if the tree fell it wouldn't make a sound through anything other than the planet and itself so you wouldn't hear anything unless you had some device that could translate the vibrations from the planet or the tree into something you could hear. And that device would have to actually touch your eardrum because with no atmosphere there would be nothing to carry the sound to your eardrum. I'm thinking that maybe if you pressed your ear tightly up to the tree or planet, maybe the cartilage in your ear would be able to transfer enough of the vibrations to hear something, but that something would probably be very faint and/or very distorted.
 
Sound is not defined as vibrations through air. Vibrations in a solid can also be sound. The sound of the tree falling will be transmit through the ground of the planet, and any spaceman in a suit with his ear to the ground nearby would hear the fall.
 
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