How did sound waves travel through the early universe and help clump matter together?
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How do you know there were sound waves in the early universe?\n\nDo you know what they say about the tree falling in the middle of the forest and there is only a man to hear the noise?
1002624
Well actually on thing first: the reason why on a spacecraft or in a spacestation air is sucked out into space, is because gas as being air rises and fills as much room as it can expand, but as space is empty it will try to consume that space. This gets vacuum mixed up with air/gas escaping.\nSo nebulas, dust, gas and other remnants can stay in one place. Although the gas expands and converts dark matter to a larger mass (process=0.000023% conversion). As also the mass expands, the same way as galaxies expand the universe like the particles of the nova gas.\nIf a spaceship or spacestation was to explode it would be a flash of light expanding on the particles that were ejected by the explosive expansion, feeding on the explosion power. Basically the explosion would push out the mass rather than the mass expanding on itself. The term of explosion in space is not yet literally confirmed but some people name it a "nova". Although it means "explosion of gas from gas cloud" to our sense. There may not be air but the dark matter would provide a vibe cushion. Although a smaller sound it will still be a "sound" that probably only certain ears can hear as well as the energy production would create a certain spectrum of sound.\nOnly man-made satellites have been broken and fallen to Earth, but I don't know of any explosions, actually they're 50% explosion proof I think.\nAlso think as if you're in a spaceship and you are travelling at 100 mph all heavier loose matter will be forced down by gravity and weight as liquid and gas and air as heavy loose matter to be heavy and travelling will cause these heavier loose matter to be forced into your face as you are gaining speed this is a vacuum of force "forced matter vacuum". With the door wide open while travelling will cause a pump or "matter pump vacuum". Making loose heavy matter to be forced to the bottom in gravity and backwards by force vacuum "also 'gravitional vacuum' ". This is called the "circulation vacuum". Like liquid you would see heavier elements go to the base and the lightest at the top this is the same physic as that of forcing heavier loose matter back in a spaceship as "circulation vacuum". This force is relative to gravity "relativity".
899198
After 1 to 3 minutes from the initial explosion of the cosmic egg (Big Bang), when temperature has cooled to about 3 trillion degrees kelvin, it is speculated that composite particles such as protons & neutrons become common state of matters.\nKey phenomena that support Big Bang Theory are:\n1) Universe is expanding, and from measurement of the proportional velocities of stars in relation to their distances from us, there is strong probability that an "Event" (such as Big Bang) occurred simultaneously,\n2) detection in 1964 of microwave radiation from not only one location in the universe (but from all directions at once), lends credence to the theory,\nShape/sizes of galaxies or rather the sizes of the galaxy clusters (to aid in estimating distance of faraway galaxies from us)nmay shed more light into the age of the universe as it is postulated that such galaxies and and milky way were at the same point in time at the time of explosion.
638759
The question assumes that the matter was compacted, but before the big bang, there was no universe as we understand it, so the idea of "volume" is somewhat meaningless.  What was the sound that came before silence?\n\nPre-BigBang makes your head hurt doesn't it? It does mine!
394864
condensed molecules are tightly packed so the sound wave vibration goes from each one in a quick succession.\n\nBTW, sound travels farthest in water! it travels cleanest in air
843796
The CMBR is not in the past. It is here now. \n\nThe cosmic microwave background is a prediction of Big Bang theory. In the theory, the early universe was made up of a hot plasma of photons, electrons and baryons. The photons were constantly interacting with the plasma through Thomson scattering. As the universe expanded, adiabatic cooling (of which the cosmological redshift is an on-going symptom) caused the plasma to cool until it became favourable for electrons to combine with protons and form hydrogen atoms. This happened at around 3,000 K or when the universe was approximately 380,000 years old (z=1088). At this point, the photons did not scatter off of the now neutral atoms and began to travel freely through space. This process is called recombination or decoupling (referring to electrons combining with nuclei and to the decoupling of matter and radiation respectively).\n\nThe photons have continued cooling ever since; they have now reached 2.725 K and their temperature will continue to drop as long as the universe continues expanding. Accordingly, the radiation from the sky we measure today comes from a spherical surface, called the surface of last scattering, from which the photons that decoupled from interaction with matter in the early universe, 13.7 billion years (13.7 G yr) ago, are just now reaching observers on Earth. The big bang suggests that the cosmic microwave background fills all of observable space, and that most of the radiation energy in the universe is in the cosmic microwave background, which makes up a fraction of roughly 5×10-5 of the total density of the universe.
415417
Like a few other questions (why is the distribution of matter lumpy instead of smooth?), this can be answered if the inflationary theory of the Big Bang is correct. In this theory, the universe we have access to was once extremely tiny, and just by luck there weren't that many monopoles in it, maybe only a couple; so when it inflated to its present size, we end up with that very small number over the whole universe. \nOtherwise, it's an open question.
396288
Sound needs a medium to travel such as air or water. Since there are no air molecules in space, sound can not travel. This is demonstrated when you sound a tune fork inside a closed bottle and then suck the air out of the bottle. The tune fork will vibrate to eternity since the air molecules are not there to create friction, but you will not hear any sound coming from it.\n\nIt would have been nice if it was like that. You can shout your name and it echoes in the heavens for eternity. But, alas, that is not so.
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The main reason is because of the general expansion of the universe.  \n\nThe best analogy is to imagine a polka-dot balloon.  As you blow up the balloon, all the dots are moving away from each other.  From the point of view of any one of the dots, all the other dots seem to be moving away from it, and the further away a dot is, the faster the dot seems to be moving.\n\nThus with the galaxies in the Universe; as we look at them with our telescopes, it appears that the farther away a galaxy is from us, the faster it is moving away from us.  But actually, all the galaxies including ours are moving away from each other as the Universe expands.\n\nThe red-shifting is part of what's known as the Doppler effect.  You'll easily notice this effect with regard to sound.  As, say, a car with a stuck horn passes by you, you'll hear a higher pitch to the horn as it approaches you and then it lowers as it moves past and away from you.  This is because the car is moving, relative to you, at a significant fraction of the speed of sound; so as the car approaches, the sound waves start to "catch up" with each other, shortening the wavelength and producing a higher tone.  Then as the car moves away from you, the sound waves get "left behind," the wavelength is stretched out and the tone sounds lower.\n\nThe same thing happens with light, though the relative speed has to be much greater in comparison with the speed of light.  The further away a galaxy is from us, the faster it is moving away relative to us, and the light from the stars in that galaxy is red-shifted as the wavelengths are stretched out.  If the stars were moving towards us with the same speed, the wavelengths would be shortened and the light would be blue-shifted.
1071523
yup you are right. The force requires matter. Like a tree in the forest falling. Sound waves are created but if no one hears it does it really exist?
32832
actually they do not care at all if you believe it or not, they are just highly intelligent people who are using rational evidence to make theories.  i will share with you the most compelling piece of evidence which proves beyond any doubt that the universe is expanding.  and if the universe is expanding... well, it had to start somewhere right? it's just a logical conclusion formulated and agreed upon by very intelligent people, and they didnt just pull it out of their butts.\n\nso here is how we know the universe is expanding: the doppler effect. This is an effect observed with waves, most observably with sound and light waves. Basically, it says that waves moving toward you have a shorter wavelength, and waves moving away from you have a longer wavelength. \n(  (  (  (x)))) -->\nKind of like that, the waves are closer together at the front, kind of like they are being bunched up, they are staying closer to the object(x) since it is moving and getting closer to them. This is the Doppler effect. With sound waves, this effect means that coming toward you, sound waves have a shorter wavelength(notice that the distance between each wave is shorter) and a higher frequency(notice that more waves would pass a given point per second since they're closer together) the formula is v=fw where v is velocity, f is frequency and w is wavelength; as you can see, since v is constant(the speed of light) f and w are inversely proportional so when one goes up, the other goes down. This higher frequency results in a higher pitch of the sound. This has been easily observed with sound.  this means that the waves coming from an object moving away from you has a lower frequency.\n\nWhen dealing with light, these differences in wavelentgh and frequency actually leads to a change in color, because the different colors just correspond to different wavelengths of light.(speeds must be very high to observe these changes) When an object is moving toward us, the wavelength is shorter and the frequency is higher, so we observe a "blue shift" because blue has the highest frequency, and when an object is moving farther away, the frequency is lower and wavelenth is longer, so we observe a "red shift," since red has the highest frequency(lowest wavelength, it looks longer, see the 'diagram' i tried to represent above...) \n\nWell, we currently observe a red shift in other stars using strong telescopes, meaning that everything in any direction is getting farther and farther away from us and therefore, the universe is expanding.\n\ni hope i gave you some insight into some of the observations that are made before such a theory is created.  science has much evidence, which is why it is supported by so many intelligent people. scientists are very skeptical and will not believe anything unless proper evidence is presented to them, and even then will not really believe it, just admit that it may have happened that way. like the big bang theory, we didn't say "this is what happened, deal with it", we say "hey, it seems from the evidence that this is a possibility and makes a lot of sense... but it's still just a theory."
669327
There is no actual proof as such although the evidence to support the theory is pretty convincing. The first piece of evidence is that the universe is observed to be expanding. Galaxies are observed to be receding from us. This is determined by the shift in their light to the red end of the visible spectrum. It's an effect you can hear with sound; as a vehicle approaches you blowing its horn you will hear the pitch of the sound change from high to low as it then travels away from you. It's called the Doppler effect. It aslo happens with light, only light changes colour from blue (coming towards you) to red (going away from you). The lightwaves are compressed and stretched just like sound.\n\nSince galaxies are moving away from us they must have been concentrated at one point in the distant past. That the singularity of the Big Bang.\n\nThe other piece of evidence is the background radiation of heat left over from the Big Bang. This was predicted to exist by proponents of the Big Bang, and was discovered accidentally in 1963. It's the leftovers of the tremendous heat generated by the explosion, and is 2.93 degrees above absolute zero.
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Hey.....its easy........you can take a volume of space, remove everything possible out of it, and then freeze it to degrees approaching absolute zero so that most of the background radiation gets zapped too and still there is something in that space. Energy and particle creation can still exist in such a realm. \n\nWhat is it? It is the basic ingredient of the Hyperspace that contain our physical Universe and many other parallel and non-parallel universes. \n\nThe ZPE modules that recycle in the form of life in the physical universe and other universes in the Hyperspace to gain next levels of energy elevation actually are part of an integrated consciousness – the essential part of the type IV civilization. \n\nThese ZPEMs actually provide the necessary suction force to control, manipulate and maintain the Physical and other parallel universes. Thus the mechanisms by which the Hyperspace as well as the countless individual Universes is maintained are really composed of a complex structure of the ZPEMs. \n\nThese ZPEMs are the life forms all over the Hyperspace, individual universes and even in the chilled or flat universe that forms the foundation of everything. \n\nIf you try to visualize the intensity of the ZPE – Zero Point Energy, consider the following : \n\nRadio waves, light, X-rays, and gamma rays are all forms of electromagnetic radiation. Classically, electromagnetic radiation can be pictured as waves flowing through space at the speed of light. The waves are not waves of anything substantive, but are in fact ripples in a state of a field. These waves do carry energy, and each wave has a specific direction, frequency and polarization state. This is called a "propagating mode of the electromagnetic field." \n\nEach mode or module is a tiny amount of energy, but the number of modes is enormous, and indeed increases as the square of the frequency. The product of the tiny energy per mode times the huge spatial density of modes yields a very high theoretical energy density per cubic centimeter. The zero-point energy density would be at least 110 orders of magnitude greater than the radiant energy at the center of the Sun. \n\nThe really provides an idea of the level of energy we are talking about! The ZPEs collectively control the gravity and electromagnetic force fields in the 3-D Physical Universe. Similarly they also control the spatial structures of other Universes.\n      Hope i helped i some way.....cya.!!
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If you increase the energy density (temperature) of a volume of space, particles therein collide with each other at higher speed. If things get hot enough, the collisions result in particle-antiparticle pair creation and annihilation. The hotter it gets, the fast and more numerous the particles become. The BB was a hot soup of such particles early on and, as it cooled, particles stable at low temperature were all that were left (by definition, duh). That includes the fermions we all know and love. The details of why there were apparently a net number of matter vs. antimatter particles left over is still being worked out.
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C\n\nBecause soundwaves are not really particles. They use any kind of medium (solids, liquids, gases) to propagate unlike light which is actual particles of energy which is why light can travel through a vacuum (sun to earth) but Sound cannot
838362
A very specific phenomenon called decoupling (specifically the decoupling of the strong force from the electroweak force) generated what amounted to a phase change in the nature of space-time.  This drove  a rapid superluminal expansion called "inflation" or The Big Bang.  Look up inflation on wikipedia.\n\nYou are correct that the universe was expanding just because it was a hot dense ball, but that is only a small part of the story and does NOT explain the expansion we see today.
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The superclusters and clusters lie along the filaments.  These are regions of over density in the universe, and have structure much like a large web.  The idea is that the early universe was slightly "lumpy."  These lumps were over dense and more matter streamed into them, leaving the low density areas with even less matter.  Over time the high density regions (along the filamentary structure) were able to form galaxies, cluster and super clusters.