How did sound waves travel through the early universe and help clump matter together?
953573
Sound waves are energy waves that propagate through some medium that can be compressed or rarefied like the air we breath.\n\nIt's theorized that around 180,000 to 700,000 K years after the big bang compression waves (sound) moved through the plasma and hydrogen and pushed matter together and formed the early structure of our universe. During this time period, the theory says that the plasma and hydrogen that was left after the big bang was considerably denser than our atmosphere. The WMAP satellite supports the theory. Take a peek here -- \n\nhttp://faculty.washington.edu/jcramer/BBSound.html
524861
Yes, before the big bang.  Actually, that's the EARLIEST we could even begin to say that, since M-branes may have been exerting gravitational effects on each other (if they exist).
295138
Suprise answer and correct! PLASMA\nPlasma is also the most common form of matter in the universe!
654732
Sound is a form of energy which is audible that is it can be registered by the ear. It travels in a medium and cannot travel in vaccuum. It is propagated in air as a series of compression and rarefaction (or expansion zones) these zones exist along the line joining the source and observer.\n\nIt is hard to localise sound unlike light because sound travels due to the disturbance of the material particles themselves.\n\nSound travels faster in a denser medium.
103290
No. Sound is a waveform of energy that travels from particle to particle. When there's no particles the wave stops. Kind of like waves of the sea don't continue on land.\n\nBut - if you have a planet with atmosphere that's thick enough you'd get sound.
629732
Sound is a compressional wave and it requires atoms to make energy travel through. think of a pool stick being your mouth. being on earth is the same as having pool balls in front of it therefor the nergy is transferred. however in space, think of your pool stick without any pool balls in front of your stick. nothing happens. becuase there is nothing to transfer the energy. the medium is the matter that carries the sound waves.\n\nLight is a very special wave. it has tiny particles called photons that are infinity small(meaning we can't measure them but we know they are there becuase they ionize special elements.) so light is really a combination of energy and matter. and since light has a medium(tiny particles) within itself it doesn't need any other matter to travel. it can change mediums however, light travels faster in less dense areas than more dense areas which explains that is has tiny particles. sound is just a compressional wave which means when the matter is more dense it travels faster becuase the time required to travel is less becuase the molecules are closer. since light has its own molecules it can't travel through dense matter becuase the dense molecules block the light's particles from traveling.
680506
while it is true that sound cannot travel thru space as such, since there is no tangible medium for it to travel, it is incorrect to state the reason of "space is a vacuum" as it is not, there is normally at least 1 particle per cubic metre, which is not dense enough to allow the propogation of a pressure wave, ie sound.
889614
actually, there may be something in the nothingness of a vacuum....\n\nwell,, sound (waves) needs a medium for it to travel...\nmedium like solids and fluids...\nsound (waves) cannot travel in a vacuum..\nthere's nothing in a vacuum...\nthat's why there's no sound...\nno pressure is created by the sound waves...\nthst's why there's no sound...
1026481
Energy is neither created nor destroyed.\n\nit simply become another form of energy.\n\nWhile the air is necessary for the sound to travel, (any \nmedium that is made up of molecules will transmit sound, i.e. sound will \nnot travel in a vacuum), it also has inertia.  Thus the sound wave must \n"push" the air molecules into the next molecule and so on. The friction \nbetween the molecules  causes the sound wave to eventually lose its energy, \nand thus its volume or intensity.  All the while this is occuring, other \nobjects, animals and humans are absorbing the energy in the wave until the \noriginal energy is absorbed into other systems in the form of mechanical \nenergy or chemical energy.
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?
1099277
Ok, this may take some time.  Let's go back and review.  In the beginning of the scientific universe, there were large areas of gas and matter kinda drifting around.  As these clumps started to collide and grow larger, the core area began to become more and more dense.  When these areas finally collapsed, they created black holes and quasars around these black holes.  These black holes fed on their quasars like a huge vacuum machine.  This suction led to an acceleration of particles in a circular fashion.  This continued until the black hole completely consumed the quasar.  When the quasar was gone, the black hole was unable to feed on local matter anymore.  The circulation, however, is still going.  This circulation compresses and glows brighter, obscuring the black hole from view.  When some particles in this compressed disk reach the force needed to escape the gravitational pull of other objects it shoots out at near the speed of light.  Imagine it this way . . . you have a pillow case and in this pillow case is a toaster, an object of mass.  You start spinning this toaster and pillow case over your head.  Your hands and the foce you're using to swing the pillow case and toaster are similar to the forces of the black hole and the pillow is acting as the hole's quasar.  When you release the pillow, you have demonstrated the black hole's consumption of the quasar.  For a period of time (remember scale here) the toaster will stay in orbit around you.  On earth, it's a fraction of a second and a short distance, but in the big picture, its billions of years and in terms of lightyears.  When the toaster finally leaves orbit, it and some of the matter that's attached to it will leave at a high rate of acceleration.  That's why.  Even though the force of the black hole is powerful enough to suck it in, the rotational force and the object's distance from the black hole are enough to keep it from being drawn into the black hole.  I hope this helps.
1073548
The Big Bang theory is the most popular one. It is hypothesized that the universe was a collection of dust and other particles forming to one huge mass, until heat and gases formed and pressure from gravity and mass caused it all to erupt in one "big bang" causing everything to project and very high speeds in all directions.\n\nOur world was theorize to have originated through this process. The debris and particles that were projected from the point of origin (now the sun) and locked into its gravitation rotation. The larger mass debris attracted other smaller debris by its gravitational pull to form an even larger mass.\nThis mass growing in size of gases, dust and other particles started to alter by factoring conditions such as distance from the sun and compostion of gases and such. Eventually providing the right conditions and atmosphere to form water which is the basis of life. From that life was made sustainable by the oxygen created by water and plant life... so a billion bunch years later we have our planet earth and the universe we live in surrounded by other planets and stars.\n\nThere are also legends and tales from various religions and cultures that tell the begins of our universe and earth. You'll have to look these up and see.
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.
679344
Speaking from the vantage point of one with some training in physics...  You are entirely correct.  Astronomers even take advantage of this effect by looking at extremely distant objects to see what the very early universe was like.\nVery intelligent question!  Good observation.\n\nAdditional: Some of the other answers are raising a valid point.  (Good job, Silverskorpious and Johhny!)  Space and time are not rigid and flat, but curved and pliable.  However, the phonomenon still works since any amount of time passing bewteen the emission and perception of light still places the event firmly in the past by the time it's observed.
353300
This question goes all the way back to the formation of the solar system.  Back then, when the Sun was a very young star, it was surrounded by what's known as an 'accretion disk'.  This disk was simply just a lot of gas and dust that never got sucked into the sun.  Eventually, particles started colliding with each other and they started to clump together.  Eventually the clumps started sticking to other clumps, so on and so forth.  However, there was a difference starting to show up.  The sun, being young as it was, was really hot, and it had pretty strong solar winds.  These winds were able to blow lower mass particles (like hydrogen and helium) out of the inner solar system.  So planets like the Earth and Mars were never able to collect these gases.  But out by, say, Jupiter, the winds had calmed down.  And it was a lot colder.  Cold enough, in fact, that water ice could form on the surface of the new planets.  This water ice added to the mass of the outer planets.  Once this ice was added, there was enough mass for the outer planets to incorporate hydrogen gas.  Hydrogen and helium are both incredibly light gases.  If a planet don't have a strong enough gravitational field, then it won't be able to hold on to the H and He.  With the ice and the cooler temperatures, this was able to happen.\n\nWow, I kind of rambled there, but I hope it helps!
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.
728459
1. Here is a real picture of the beginning of the Universe that we have recently made. It shows "light" or the energy that first appeared.\nhttp://www.princeton.edu/pr/pwb/03/0217/\n2. Tiny bundles of energy came together and we named those bundles, "photons". Photons fly in waves of different sizes. We call all those waves of energy bundles the "electromagnetic spectrum".\n3. Two or three photons can come together and form tiny shimmerings that we named "particles". (electrons, protons, neutrons). \n4. Those tiny shimmerings are also called "matter". When photons get tangled up together into shimmerings, they do not fly in waves anymore. When the photons in matter particles get untangled, they fly away again in waves. When photons are flying in waves, we call it "energy". When photons are tangled up, we call it "matter. That is what Einstein's E = MC2 means, energy can change into matter and matter can change back into energy.\n5. We call energy that is tangled up into shimmerings "potential" energy".\n6. Those tiny shimmerings or particles of matter of tangled photons can come together and form shimmering families called "atoms". \n7. Atoms can come together with other atoms that are alike and form elements, or, kinds of families (based on how many electrons, neutrons and protons they have). Examples of elements are hydrogen, oxygen, gold, carbon, etc. (Periodic Table of Elements).\n8. Elements can come together and form large shimmerings such as nebulas, suns and planets and apples and you and I. \n9. When shimmerings bump into each other in anyway, we call that "mechanical" energy. There are many forms of mechanical energy. \n10. When shimmerings are moving, they can bump into other shimmering constructions. That is called the "energy of motion".