| Topic: |
Religions > Atheism |
| User: |
"Uncle Clover" |
| Date: |
10 Nov 2006 07:30:14 PM |
| Object: |
OT: Another hypothetical physics question |
Hello again!
Me again. What can I say? I'm a glutton for punishment.
Suppose we figure out how to create new "realities" such as our own space/time
reality. Suppose we were to create such a reality, but the only thing it
contained were an exact replica of Earth. This would mean that in that entire
"universe" (for lack of a better word), the copy Earth would be under the
influence of its own physical forces (gravity et al) and nothing else.
What would happen to that Earth? I see three possibilities and can't really say
which seems more likely, or if it's another possibility entirely. The three
I've figured are:
1. Nothing, the Earth would simply grow cold and dead;
2. The copy Earth, being free of any of the forces this Earth is subjected to
by the rest of this "universe", would slowly collapse under its own weight -
this might be in the form of "settling" over a vast amount of time, or it might
be in the form of an implosion of the type from which black holes can be formed;
3. The copy Earth would begin to expand or "come apart" and eventually grow to
be distributed over such a large area as to be non-existent for all practical
intents and purposes. This might also take the form of a sort of "erosion", but
I don't think that would happen with no other gravity for the "eroded" material
to get sucked out of copy Earth's gravitational field.
Is there a likelihood that I've missed? :-? Just curious. Thanks for any
replies, even if they're just replies to tell me what a stupid question it was.
:-\
--
L8r,
Uncle Clover the AntiTwink
************************************************
The true mark of a civilized society is that its
citizens know how to hate each other peacefully.
************************************************
.
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| User: "Al Klein" |
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| Title: Re: OT: Another hypothetical physics question |
10 Nov 2006 09:01:12 PM |
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On Fri, 10 Nov 2006 20:30:14 -0500, Uncle Clover
<UncleClover@SpamMeNot.com> wrote:
Is there a likelihood that I've missed?
Our creating our own singularity (universe) and controlling what is
inside it. As far as we know that's impossible.
--
rukbat at optonline dot net
"Every sensible man, every honest man, must hold the christian sect in horror. 'But what
shall we substitute in its place?' you say. What? A ferocious animal has sucked the
blood of my relatives. I tell you to rid yourselves of this beast and you ask me what
you shall put in its place?" - Voltaire
(random sig, produced by SigChanger)
This signature was made by SigChanger.
You can find SigChanger at: http://www.phranc.nl/
.
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| User: "Matt Silberstein" |
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| Title: Re: OT: Another hypothetical physics question |
11 Nov 2006 07:28:25 AM |
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On Fri, 10 Nov 2006 20:30:14 -0500, in alt.atheism , Uncle Clover
<UncleClover@SpamMeNot.com> in
<sb8al29ejqe9ufs55vkpik55ufk1nu63an@4ax.com> wrote:
Hello again!
Me again. What can I say? I'm a glutton for punishment.
Suppose we figure out how to create new "realities" such as our own space/time
reality. Suppose we were to create such a reality, but the only thing it
contained were an exact replica of Earth. This would mean that in that entire
"universe" (for lack of a better word), the copy Earth would be under the
influence of its own physical forces (gravity et al) and nothing else.
What would happen to that Earth? I see three possibilities and can't really say
which seems more likely, or if it's another possibility entirely. The three
I've figured are:
1. Nothing, the Earth would simply grow cold and dead;
2. The copy Earth, being free of any of the forces this Earth is subjected to
by the rest of this "universe", would slowly collapse under its own weight -
this might be in the form of "settling" over a vast amount of time, or it might
be in the form of an implosion of the type from which black holes can be formed;
3. The copy Earth would begin to expand or "come apart" and eventually grow to
be distributed over such a large area as to be non-existent for all practical
intents and purposes. This might also take the form of a sort of "erosion", but
I don't think that would happen with no other gravity for the "eroded" material
to get sucked out of copy Earth's gravitational field.
Is there a likelihood that I've missed? :-? Just curious. Thanks for any
replies, even if they're just replies to tell me what a stupid question it was.
:-\
I see absolutely no reason for 2, none. In physics class speak I would
put this: imagine a Universe that only contained the Earth exactly as
it is today. What would happen. The answer is that it radiates until
the whole Universe is (close to) the same temp. It might sublimate a
bit, your "come apart", but that would take billions of years. Then in
trillions of years the particles with long lives would decay.
--
Matt Silberstein
Do something today about the Darfur Genocide
http://www.beawitness.org
http://www.darfurgenocide.org
http://www.savedarfur.org
"Darfur: A Genocide We can Stop"
.
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| User: "Chris H. Fleming" |
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| Title: Re: OT: Another hypothetical physics question |
10 Nov 2006 10:34:13 PM |
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Uncle Clover wrote:
Hello again!
Me again. What can I say? I'm a glutton for punishment.
Suppose we figure out how to create new "realities" such as our own space/time
reality. Suppose we were to create such a reality, but the only thing it
contained were an exact replica of Earth. This would mean that in that entire
"universe" (for lack of a better word), the copy Earth would be under the
influence of its own physical forces (gravity et al) and nothing else.
What would happen to that Earth? I see three possibilities and can't really say
which seems more likely, or if it's another possibility entirely. The three
I've figured are:
1. Nothing, the Earth would simply grow cold and dead;
2. The copy Earth, being free of any of the forces this Earth is subjected to
by the rest of this "universe", would slowly collapse under its own weight -
this might be in the form of "settling" over a vast amount of time, or it might
be in the form of an implosion of the type from which black holes can be formed;
3. The copy Earth would begin to expand or "come apart" and eventually grow to
be distributed over such a large area as to be non-existent for all practical
intents and purposes. This might also take the form of a sort of "erosion", but
I don't think that would happen with no other gravity for the "eroded" material
to get sucked out of copy Earth's gravitational field.
Is there a likelihood that I've missed? :-? Just curious. Thanks for any
replies, even if they're just replies to tell me what a stupid question it was.
:-\
--
The question makes no sense until you write down some kind of metric.
You need a spherically symmetric, closed universe metric. The
Fiedman-Robertson-Walker metric can do that. Though I'm not sure how
you can make your matter content compatible with the geometry (which is
necessary for GR). Assuming you could do that, IIRC the closed FRW
universe inevitably collapses.
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