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A dragon is a legendary creature, typically with serpentine or reptilian traits, that features in the myths of many cultures.
Dragons are often held to have major spiritual significance in various religions and cultures around the world. In many Asian cultures dragons were, and in some cultures still are, revered as representative of the primal forces of nature, religion and the universe.
They are associated with wisdom—often said to be wiser than humans—and longevity. They are commonly said to possess some form of magic or other supernatural power, and are often associated with wells, rain, and rivers. In some cultures, they are also said to be capable of human speech. In some traditions dragons are said to have taught humans to talk.
Originally posted by Astyanax
Sounds do not persist for ever. There is a random ambient noise level, even in a so-called silent room, caused by the random motion of air molecules. When a sound fades below this level, it's gone. More
Originally posted by Astyanax
reply to post by new_here
No, they're gone for ever, their energy absorbed by the molecules of gas or liquid they set in motion.
The same goes for photons, except that they're usually absorbed at the subatomic level, typically by electrons.
edit on 8/8/13 by Astyanax because: there is no free lunch.
Interesting.
When I hear the sound, when the waves come into my ear canal, do I absorb them?
Do they become part of me?
And what exactly are 'they' anyway? Sound waves, yes... but what specifically is the wave composed of?
Does it vary, or is it always and forever the same elements being formed into waves of sound?
Oh, the questions... haha.
I would take it that air pressure settles the ambience back to silence after the introduction of a sound.
How does sound travel through a vacumm if there are no molecules to excite?
Originally posted by Astyanax
reply to post by new_here
Oh, the questions... haha.
Ask away, and I will do my best to answer.
What I think I hear you saying is, waves of vibrational energy (in the auditory spectrum- aka sound waves) fan out and 'excite' forms of matter as they pass thru them. Thus the waves themselves are not comprised of anything. (How am I doing so far?)
And what exactly are 'they' anyway? Sound waves, yes... but what specifically is the wave composed of?
Matter. Any kind will do, more or less. Sound travels through gases, liquids and solids. Sound is really just stuff vibrating.
Originally posted by Wifibrains
Thanks for the information.
It makes sense that sound gets quieter and seemingly disapears, by as you say, being absorbed.
What I think I hear you saying is, waves of vibrational energy (in the auditory spectrum - aka sound waves) fan out and 'excite' forms of matter as they pass thru them. Thus the waves themselves are not comprised of anything. (How am I doing so far?)
1. Is it safe to say sound waves are stored energy (potential energy?) on a journey, having been propelled into motion by force applied to matter elsewhere?
1. Kid beats a drum in the next room - kinetic energy excites the drum, adjacent air molecules, hardwood floor, et cetera, in a succession of waves, which travel thru the dog, a wall, and my glass of wine, finally passing thru me and beyond.
2. Cork and feathers fail to conduct sound well because of their mass and/or form (cork = porous; feathers = random surface) in which the vibrational energy gets 'stuck' or 'tangled in' and ricochets around until it... (help me here b/c I know energy never goes away it just changes form...) So what really transpires when it enters cork? I'd say it absorbs it, but that would imply cork is chock full of energy potential, LoL.
Porous materials such as mineral wool work to control and reduce noise by allowing air movement into the fabric of the material. The fluctuations of air molecules – which form sound waves – move into the body of the material, where friction between the air particles and the material’s narrow airways cause sound energy to be dissipated as heat. Source
3. True or False: The more excitable matter is (vibratory potential?) the more conductive it is. Or have I got this 'bass ackwards'?
4.An echo in a valley doesn't go on forever b/c some of the sound is absorbed each time, subtracting from the initial release, until all has been absorbed. (Where does it actually go when it is absorbed? Something is exciting those molecules so we ARE talking energy, right?)
5. What categories of... forces/energy? ... have the power to generate sound? (kinetic, and...)
6. You made me see a connection between the minuscule amount of heat potential in sound waves + feathers not conducting sound (thus absorbing it) + ducks can swim in REALLY cold water and not get frostbite! Would you ponder any relevance that may have (such as energy potential) to that cork in my wine bottle? (Besides the fact I can drink it and get a warm fuzzy feeling, LoL...
Thanking you in advance!