The entropy of systems

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stoat</i>
<br />That article is bad in that it doesn't explain that we are talking radio temperatures. A for instace of this, the earth has a much higher temperature than the sun at the frequencies associated with television broadcasting.

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So, very few people would understand that 100 million degrees means "cold".
The article is misleading then.

According to you, could heat be the result of an altered state of the atom?
When the energy state of the atom is altered, is there a condition where this is done irreversibly?

I think in order to have a natural system evolve, it HAS to be an irreversible process. There is always more energy available before work is performed than after.

[] It's politics GD. The guy is after time on a radio telescope array. There's a lot of conflicting interests here. it gets mean, dirty and vicious. If you were to try the same ploy as this guy, on the temperature of mobile phone masts for instance, he would howl, "not fair," unless of course he lived right next to the the mast you objected to.

On your second point, an isolated atom at absolute zero has to implode and release its energy in one fell swoop as a gamma ray burst. The atom woud be gone but energy can't be destroyed and it could play a part in the rebuild of new atoms. However, if I'm right about the entropy curve not passing through zero, then it would be good if the implosion stops at hydrogen. or deuterium.

Here's one for Tom Van Flandern, I think. I was thinking about a ball of stars, that needs to flaten out into a disk. Now they are a whole bunch of "little" gyroscopes pointing in all directions. Also, if gravity travels at the speed of light, they have information problems. Let's assume a tiny angular momentum to the ball, and have two stars at the apex and about 300 million light years out. So they sing, "I'll take the high road and you take the low road..." One drops down the radius vector but the other follows the circumference. Nature does this, it takes maxima or minima. The result will be a disk but it will look like a fedora hat. It will have a brim pulled down and the back tilted up; a cubic equation shape. The disks angular momentum would also differ from a model where the stars simply "fall."

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stoat</i>
<br />[]
On your second point, an isolated atom at absolute zero has to implode and release its energy in one fell swoop as a gamma ray burst. The atom woud be gone but energy can't be destroyed and it could play a part in the rebuild of new atoms. However, if I'm right about the entropy curve not passing through zero, then it would be good if the implosion stops at hydrogen. or deuterium.


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I found two more articles on the web:

Article 1
"Interstellar Medium (ISM):
The ISM plays a crucial role in astrophysics precisely because of its intermediate role between stellar and galactic scales. Stars form within the densest regions of the ISM, molecular clouds, and replenish the ISM with matter and energy through planetary nebulae, stellar winds, and supernovae. In turn, this interplay between stars and the ISM helps determine the rate at which a galaxy depletes its gaseous content, and therefore its lifespan of active star formation."

Article 2
"The distance between the Sun and the Galactic Center, referred to as Ro, is an important one. Many of the measured parameters of galactic objects such as distance, mass and luminosity are directly related to Ro, which has an estimated value of 8.0 kilo parsecs (~26,000 light years), with a standard error of about 0.5 kilo parsecs. Furthermore, many of the estimates of both the gravitational mass and luminosity of objects within our Galaxy, and even our Galaxy itself, are proportionate to Ro. As the estimate of this distance changes, so does the estimated distance, mass and luminosity of scores of galactic and extra-galactic objects. For this reason, astronomers continue to put a concerted effort into establishing an accurate value for Ro."

Article 1 mentions the depletion of matter in a galaxy with time

Article 2 mentions how this depletion is achieved: by changing the position of a mass (Earth) with respect to the center of a bigger mass (center of galaxy).

Do you agree that evolution means a change in energy state? This change is therefore irreversible.

evolution means slowly converting matter into energy (for the Earth this might take billions of years)

About the only thing I can think of that's irreversible is the black dwarf, and even then there may be somw way that these can redistribute themselves. They might just "fade" away, or explode. We must balance against the very slow run down of the universe, emergent forces. Entropy and increasing complexity seem to be paradoxically linked.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stoat</i>
<br />... We must balance against the very slow run down of the universe, emergent forces. Entropy and increasing complexity seem to be paradoxically linked.
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Lets hope you are right.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stoat</i>
<br />[]
On your second point, an isolated atom at absolute zero has to implode and release its energy in one fell swoop as a gamma ray burst. The atom woud be gone but energy can't be destroyed and it could play a part in the rebuild of new atoms. However, if I'm right about the entropy curve not passing through zero, then it would be good if the implosion stops at hydrogen. or deuterium.


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Stoat: Do you wish to continue?

In this paragraph, are you describing the atom at the proximity of a black hole?

When you say "absolute zero" do you mean temperature or forces which tend to zero?

What could cause the implosion of the atom?