Is entropy only a physics' word?
820731
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393162
Yes entropy increases.
799751
The first law is energy cannot be created or destroyed, only converted from one form to another.\n\nThe second law is basically the entropy of the universe increases during any spontaneous process.  This is more easily thought of as energy moves from areas of higher energy to areas of lower energy AS LONG AS IT IS NOT PREVENTED from doing so.  In other words, energy disperses unless it's blocked.
560819
well entropy is the measure of the randomness of the particles in question.
177449
The second law is a statistical law. There was an experiment recently where minor violations were found because the number of particles in the system was so small. But other than such things, the second law is a law of thermodynamics and is accepted by all scientists. Warning: many lay people misunderstand what the second law says and derive wierd conclusions from their misunderstandings.
517293
no thought cannot have expression for entropy, as thought has no direction.\n\nand moreover thought is a property not a particle, so it cannot ever have entropy.
1095558
It is best explained in rap by MC Hawkings\n\nEntropy  \nTrash Talk \nHarm me with harmony.\nDoomsday, drop a load on 'em.\n\nVerse 1 \nEntropy, how can I explain it? I'll take it frame by frame it,\nto have you all jumping, shouting saying it.\nLet's just say that it's a measure of disorder,\nin a system that is closed, like with a border.\nIt's sorta, like a, well a measurement of randomness,\nproposed in 1850 by a German, but wait I digress.\n"What the fuck is entropy?", I here the people still exclaiming,\nit seems I gotta start the explaining.\n\nYou ever drop an egg and on the floor you see it break?\nYou go and get a mop so you can clean up your mistake.\nBut did you ever stop to ponder why we know it's true,\nif you drop a broken egg you will not get an egg that's new.\n\nThat's entropy or E-N-T-R-O to the P to the Y,\nthe reason why the sun will one day all burn out and die.\nOrder from disorder is a scientific rarity,\nallow me to explain it with a little bit more clarity.\nDid I say rarity? I meant impossibility,\nat least in a closed system there will always be more entropy.\nThat's entropy and I hope that you're all down with it,\nif you are here's your membership.\n\nChorus \nYou down with entropy?\nYeah, you know me! (x3)\nWho's down with entropy?\nEvery last homey!\n\nVerse 2 \nDefining entropy as disorder's not complete,\n'cause disorder as a definition doesn't cover heat.\nSo my first definition I would now like to withdraw,\nand offer one that fits thermodynamics second law.\nFirst we need to understand that entropy is energy,\nenergy that can't be used to state it more specifically.\nIn a closed system entropy always goes up,\nthat's the second law, now you know what's up.\n\nYou can't win, you can't break even, you can't leave the game,\n'cause entropy will take it all 'though it seems a shame.\nThe second law, as we now know, is quite clear to state,\nthat entropy must increase and not dissipate.\n\nCreationists always try to use the second law,\nto disprove evolution, but their theory has a flaw.\nThe second law is quite precise about where it applies,\nonly in a closed system must the entropy count rise.\nThe earth's not a closed system' it's powered by the sun,\nso fuck the damn creationists, Doomsday get my gun!\nThat, in a nutshell, is what entropy's about,\nyou're now down with a discount.\n\nChorus \n\nTrash Talk \nHit it!\nDoomsday, kick it in!
173866
The second law of thermodynamics states that in any closed system (whih could mean the universe), the total entropy (disorder) is always increasing.\nThe total disorder in the universe is always increasing despite the fact that sometimes, certain areas seem to be getting more ordered.  Take, for example, a randomly arranged deck of cards which is in a state of total entropy.  If you rearrange the cards and order them up again, it would seem like the total entropy went down, actually, it still went up.  The energy you spent arranging the cards created a greater increase in entropy than the outcome of the arranged cards.  In other words, no matter what, entropy is always increasing.\n\nEven the energy I spent typing a seemingly ordered set of characters to make works in this answer has increased the total entropy in the universe (you can thank me later).\n\nThe second law of thermodynamics is a LAW for a reason.\nYou cannot reverse the flow of entropy, if you decrease it one place, it must increase somewhere else with a greater magnitude.
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The Second Law merely describes the observed data.  The lower entropy in the past is what is being described by the Second Law.\n\nScience cannot answer why things are as they are, but only can describe them and project into the future, based on the assumption that the future will be like the past.
721826
"Arent all particles material?"\n\nNo.\n\nThere is a concept called wave-particle duality.\n\nHere is an example of a non-material particle, the phonon:\n\nhttp://en.wikipedia.org/wiki/Phonon
698314
Entropy would increase because when a solid goes to liquid there is more disorder.  They were be more energy because molecules in a liquid move alot faster than in a solid.
285523
My definition of matter is "condensed energy"
25670
Some systems actually cool as they deliver power.  A rubber band is most common example I can think of.  If you expend energy to stretch a rubber band, it actually heats up, but it cools slightly as it contracts, which could potentially power some small device like a toy car.  Why this occurs is a little complicated, but the exact same principle of entropic cooling is used to achieve the lowest temperatures currently possible.\n\n***Response to first answerer***\nWhat basic law of motion are you talking about?  The second law of thermodynamics? Because that deals with entropic differences, and doesn't apply. The "laws of motion" aren't even relevant to this thermodynamics question.  \n\nI used the example of a rubber band because it is a clean example of entropic cooling, but in fact ANY  heat engine will result in a decrease in thermal energy of the system. It's true that there is some heat produced from friction in the engine, but on a whole more MORE heat flows into the engine than flows out.  The average temperature of the system decreases. That's why we can use heat engines to power things.
899876
No special reason. All letters have been used in physics.\nRather arbitrary chosen.\n\nTh
1151554
Chaos theory describes nonlinear dynamic systems that under certain conditions exhibit a phenomenon known as: chaos. The idea is that even having known the initial state, there is a certain determination of randomness to be made.\n\n Entropy, as it could relate to Chaos Theory would be the measurement of the quantity of information in a given random variable. However, the law of entropy - describes the point where the amount of free energy available is zero. Which still relates in a broad sense.\n\n That is about as nutshell as I can get it without oversimplifying it.
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The description of entropy as the tendency to descend into chaos is incorrect. Entropy actually describes the amount of usuable energy in a material. It has a statistical interpretation, but even that is closer to saying that the state of a system gets more probable over time.\n\nNext, when working with entropy, it's important to realize that it is only required to increase in a closed system, that is, one that has *no* heat or energy exchange with anything else. For a tree, there is a lot of energy coming in through sunlight. And, in fact, it is the energy of sunlight that drives the local decrease in entropy.\n\nThere is another quantity, called the Gibbs free energy, that is a combination of entropy, temperature, and the energy of a reaction that is more appropriate for non-closed systems. It is described by H-TS, where H is the energy of the reaction, T is the temperature, and S is the entropy. The Gibbs free energy is what must decreasein systems that are not closed (and under constant pressure).
857691
Molecules changing state from liquid to gas...entropy increasing...S is positive.