why cant you hear anything when you are on the moon?
490625
The space has no air i.e. it is vacuum. A sound needs some medium to travel. As there is no air around the moon the sound does not travel and thus one can not hear anything on the moon.
494299
Because your ears aren't sensitive enough\nbut actually if they are sensitive enough, u can hear it.
137132
When someone speaks above the water, the person underwater will hear it "twinkle" in exactly the same way and for the same reason as stars twinkle.\n\nSound undergoes various effects when it hits the surface of water including reflection, refraction and dispersion. the specifics of what happens depends on the volume of the sound, the surface shape of water (which tends to be irregular and turbulent, more so with a person under it) and the depth of water between surface and listener.\n\nthe listener will end up hearing a very distorted version of the speech with varying loudness, just like twinkling stars.\n\nnow will the listener be able to understand what is being said is a slightly different question. you can take it safely that if the speaker were reciting poetry, the listener will barely understand. but if the speaker were standing, with a horrified look on the face , point out far, and *screams* something that sounds to the underwater listener like sh--k! the listener will get the message :P
37371
yes, just because nobody hears it doesnt mean it wont make a sound.
63729
yes, sound waves are caused by vibration; so it will make a sound whether anyone is around to hear it or not.
292667
Because when you open your mouth and the ear comes in as negative pressure; the ostacious tube which is a canal connecting middle ear to the pharynx is increase in pressure by air; then pushes the ear drum to out side (slightly) so the sensitivity to sound waves decreases, that is why sometimes we cant hear the sounds while we are yawning.
283342
Although we can't hear the sound the sun makes in a usual way from earth -- since sound can't travel through the vacuum of space -- we can make measurements of how portions of the sun are rising and falling and deduce what vibrations must be going through the sun because of this.  These vibrations are equivalent to sound, though at a much lower frequency.  For instance, middle C on a musical instrument vibrates the air back and forth 256 times a second.  For one vibration on the sun to go back and forth typically takes 5 minutes.\n\nSo the vibrations are at a frequency far below what human hearing could pick up, but if you multiply the frequencies to bring them into the range of what we can hear, the site below lets us listen to what the sun would then sound like.  Click on the "Hear the Sun Sing" link when you get there.
1148238
Thats rather natural, however this should not only be the case when you are working out at the gym....  You should always have air inside your ears, otherwise they are blocked, and you will not be able to hear things clearly....
856454
no idea....but it could probably be cause all the sound gets sqeezed near the water surface like when you through some dough on the wall...and the ripples combine to increase thier amplitude and hence volume
102078
Yes there is sound. Don't confuse sound with 'hearing'. The speed of sound is given in ft/sec, varying with what it moves through.. There is no factor there for 'hearing'. If you turn on a flashlight at night and a beam is created, but there is no one there to 'see' it, light is still emitted; the beam is certainly there. It's the same for sound. Sound is a compresson/rarifraction wave moving through a medium. The wave is there, detected or not. Or take the case of radio electromagnetic waves. The wave is certainly propagated, even if no radios are turned on.
1029132
There's no air to vibrate, and vibrating air makes sound.\nThere is no air in SPACE.\n\n(at least WE can't hear it by normal human means)
1174955
In outer space there are some gasses but not enough in any one place to provide a medium for a sound wave to propagate through. Asteroids and meteors are silent until they enter an atmosphere.
658441
Sound is the effect your brain evokes when your tympan vibrates. These vibrations are usually caused by air that was set on the move by a distant body (like a bell, for instance). Water and other liquids can perform the same effect as air, although the "sound" you will perceive is quite different due to the distinct elastic properties of the liquid.\nIn outer space, there is almost no matter at all (that´s why its called a "vacuum"). So, there is no way of propagating a "wave" since waves need matter to be propagated (air, water, solids, etc). \nThat´s why sound doesn´t exist in outer space.
411063
no: If no one hears it, it doesn't because sound is only vibrations in the air if our ear drums don't hear it.
773542
it's because they use the moon to navigate.  artificial light confuses them.
116942
hay ther is no time on the moon the time on the moon is what time it is hear. so what i am saying is what time it is down hear that is the time on the moon.\n\nexampel\nso if it is 6:00 the time on the moon is 6:00.
147635
Sound does not travel in space. \n\nSound is created when a vibrating object (your vocal cords, a guitar string, etc.) causes the air around it to vibrate. This vibration continues to expand outwards through the air (or water if you happen to be under water) until it reaches your ear drum, which in turn vibrates. Your brain interprets these vibrations as sound.\n\nSound does not travel in space because space is a vacuum. There is nothing to vibrate. So, when the vibrations (sound) reaches the upper levels of our atmosphere, it stops.\n\nSound does travel in the space shuttle because the space shuttle is pressurized and contains air that the astronauts breath. The air provides the medium to transfer the vibrations from the source object to the astronaut's ears.