Laws of Thermodynamics

[Doc Flabby]

einstine explained this one, better than i could e = mc^2

ENERGY = MATTER * (Speed of light squared)

The speed of light is just the constant of conversion.
Like when you convert dollers to pounds the exchange rate is 1.86.

Basically he was saying.

ENERGY = MATTER

This was tested by Alot of scientists doing expeiments (blowing up shit generally) and found it was true. Thats why he is was so awesume.
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How does stuff exist then? The simple answer is we don't know.

There are many many many theories though...

The big bang is just such a theory (note no theory on the creation of the universe has ever been proved scientifically).

Following big bang theorty all the matter in the universe existed as one partical that was infinatly small and wieghted as much as the universe does. It then (for some reason) blew up and created the universe.

If the big bang is true it raises questions such as what caused it then? and equally where did all this matter come from to blow up?

[Vykromond]

The speed of light is just the constant of conversion.
Like when you convert dollers to pounds the exchange rate is 1.86.

NO

[Doc Flabby]

NO

it is. its a constant of conversion.
ok the example sucks.

but how about this one converting: temperature from Faraheight to Centigrate.

Its still the same thing.

[D1st0rt]

Speed of light in a vacuum is constant. It does vary per medium which is why we have indices of refraction.

[Volny]

The best fusion reactor of them all:

not at all...reaction is more efficient at at higher temperatures
http://en.wikipedia.org/wiki/Nuclear_fusion
"The deuterium-tritium fusion reaction rate increases rapidly with temperature until it maximizes near 70 keV (800 million kelvins) and then gradually drops off."
Sun core temperature is far from that barrier - thats why we have like another 4-5 billion years of fine mild sun shining. Because of sun inefficiency

[Fluffz]

weird, i thought about this for a while and what this universe does is converting energy to matter. also time probably only matters inside this universe. you would think that whenever someone invests that much energy into something (unless maybe its not that much at all) he has a reson for it. or it all came out of chaos. so what has matter that energy hasnt? time and gravity came to my mind.

also the universe is expanding at an increasing speed. like wtf, it wont colapse?. id like to wake up a tousand years later, out of pure interst how this whole physics idea turns out...

[!cER]

It isn't likely that we will reach temperatures of that scale in an energy producing contained reaction though (that is over 100 thousand times hotter than the sun).

Doc: What has E = mc^2 got to do with fusion? The energy is created by forming atoms with lower binding energies than those of the raw materials, not by converting mass into energy. Just to make it clear

THERE IS NO MASS CHANGE IN EITHER FUSION OR FISSION. The energy is released by converting to elements with a lower binding energy per mass (Iron and Nickel the two lowest).

The only instances I can think of it being used to convert from one to the other is either approaching relativisitc speeds, or matter/anti-matter annihilation.

[tugs]

lmao. for some reason scientific arguments are more heated than religious ones. :P

this could all be ended by a couple good links.

[K2Grey]

it is. its a constant of conversion.
ok the example sucks.

but how about this one converting: temperature from Faraheight to Centigrate.

Its still the same thing.

No.

Matter and energy are separate things.

You can convert one to the other but it is an actual conversion which occurs.

On the other hand you do not convert F temperature into C temperature, you are merely changing the units of measurements.

There is a big difference between for example converting carbon to diamond, and converting kg of carbon into lb of carbon. Same words, entirely different processes.

[Fluffz]

this could all be ended by a couple good links.

these links id want to see. how did the universe and everything in it appear in the first place? oh snap!

[K2Grey]

Speed of light in a vacuum is constant. It does vary per medium which is why we have indices of refraction.

One thing I heard was the claim that the speed of light in a medium remains at c, however, the speed of light seems to decrease since it takes time for light to be absorbed and re-emitted as it goes through the medium. Don't have a source for that though.

[!cER]

One thing I heard was the claim that the speed of light in a medium remains at c, however, the speed of light seems to decrease since it takes time for light to be absorbed and re-emitted as it goes through the medium. Don't have a source for that though.

I doubt very much this is true because energy is quantised. And if the energy of the photons happens to be less than the smallest quanta of energy in the medium then the light could not be absorbed. So you would have different wavelengths going at different speeds depending on absorbtion probability...which isn't right.

[Volny]

I.... So you would have different wavelengths going at different speeds depending on absorbtion probability...which isn't right.

Dunno about the rest but different wavelenhts have different speed in medium - in optics this is contatnt problem - you have perfect lens for one color but others are distorted.

[!cER]

Dunno about the rest but different wavelenhts have different speed in medium - in optics this is contatnt problem - you have perfect lens for one color but others are distorted.

Sorry, I didn't explain what I meant quite clearly. What you said is correct, and the effect is called dispersion - it is what creates rainbows, and is actually caused by different refractive indicies for different wavelengths. What I meant is if the photons were absorbed and re-emited in a medium rather than EM radiation being interfered with by the electrons' magnetic field then most wavelengths would be totally unaltered when going through a material. The expectional one being wavelengths corresponding to electron excitation. This does happen however and is what makes spectrum features, but doesn't explain the slowing of light in different materials....anyway, I think we are slipping from the original point here a little, aren't we?

Has anyone else heard some interesting universe creation theories?

[Da1andonly]

this thread is not for me!