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Profile Alex

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Message 2680 - Posted: 29 Sep 2004, 6:12:18 UTC
Last modified: 20 Oct 2004, 3:22:29 UTC

First of all, lets debate this 'string theory' thing.


I'll start by debunking it.

1. One reason people 'believe' in String theory is because they 'got the math to work.
Just because the 'math works' doesn't prove it's correct. Nor does the math 'not working' mean it's totally incorrect either.
For example..
example: Classical Mechanics says that to get to the speed of light, you just accellerate at accelleration a, with sufficient force so that F=Ma for a long enought t time until
Δv=aΔt
So.. math works, theory is nice and intuitive.. but.. some hairy physicist guy named Einstein had to ruin the classical mechanics theory for everyone.

2. Another reason people believe in string theory is because they 'want' to have a theory of everything. After all.. it would be convenient if an equation tied everything together nicely.
For a long time.. flat paper maps were a good representation of the known universe.. but as centuries passed, and people hopped on sailing ships.. the flat map/flat earth theory was no longer convenient. So.. convenience is not a proof of a theory.

What physicists have to do is come up with an experiment that tests string theory. IE.. vibrate something.. such as a crystal.. or a pile of helium.. or something. Maybe a photon.. because photons are odd sometimes.



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Profile Michael Berger

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Message 2697 - Posted: 29 Sep 2004, 9:58:05 UTC
Last modified: 21 Nov 2004, 12:27:01 UTC

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Profile Brian Uitti

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Message 2729 - Posted: 29 Sep 2004, 14:02:51 UTC - in response to Message 2697.  

> Here's the all-in-one formula that explains everything:
>
> 1d=10t

I hate to appear to be in disagreement .. the universal formula is

X = 47 + C

Although, there is some debate out there 'Just what is "C"?' ;-)

// Brian

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Guido Alexander Waldenmeier

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Message 2753 - Posted: 29 Sep 2004, 17:30:02 UTC

Hi HAL
Common Criteria (ISO 15408)

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Woyteck - Boinc Busters Poland

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Message 2776 - Posted: 29 Sep 2004, 20:04:57 UTC - in response to Message 2729.  

> > Here's the all-in-one formula that explains everything:
> >
> > 1d=10t
>
> I hate to appear to be in disagreement .. the universal formula is
>
> X = 47 + C
>
> Although, there is some debate out there 'Just what is "C"?' ;-)

A programming language?
;->
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Profile Michael Berger

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Message 2780 - Posted: 29 Sep 2004, 20:20:17 UTC - in response to Message 2776.  
Last modified: 21 Nov 2004, 12:26:51 UTC

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Profile Alex

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Message 2818 - Posted: 30 Sep 2004, 3:27:46 UTC

Ya.. namecalling always 'proves' a scientific theory.

People who believed the earth was round were called Heretics.

______________________________________________________________
Did your tech wear a static strap? No? Well, there ya go! :p
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Profile bjacke
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Message 2827 - Posted: 30 Sep 2004, 6:09:15 UTC - in response to Message 2697.  

> Here's the all-in-one formula that explains everything:
>
> 1d=10t
>
>
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Guido Alexander Waldenmeier

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Message 3809 - Posted: 14 Oct 2004, 15:59:02 UTC
Last modified: 14 Oct 2004, 15:59:08 UTC

[url=http://lhcathome.cern.ch/team_join_form.php?id=45/ ]Click Here[/url] to join a winner team headed to the top.
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Profile OlaV_Ouafouaf

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Message 4012 - Posted: 19 Oct 2004, 20:23:44 UTC

Perfectly
I agry, but remember
3 x 3 = 4.5 ... It's a semi-reality
;-)
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Riding too fast on highway to stop smoking ...
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Message 4364 - Posted: 26 Oct 2004, 8:59:29 UTC

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Raphael Lesage

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Message 4373 - Posted: 26 Oct 2004, 12:04:15 UTC - in response to Message 4364.  
Last modified: 26 Oct 2004, 12:06:57 UTC

1) About that dark matter theory, some physicists at nasa may have found something that will render this theory obsolete. Simply put, the laws of gravity wouldn't behave like we thought they would at long range.

http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2002/02/10/wnasa10.xml&sShe%20et=/news/2002/02/10/ixworld.html

This would remove the need for dark mass to maintain galaxies together.

2) About that big bang theorie... I always thought that there was infinite emptiness and that the big band was a big blob of energy hovering in it that exploded... Are you saying that the universe is expanding as in the limits of the existence are expanding or as in the matter is taking more and more space in it (as I thought) ?
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Message 4377 - Posted: 26 Oct 2004, 12:37:28 UTC

Re
http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2002/02/10/wnasa10.xml&sShe%20et=/news/2002/02/10/ixworld.html

Yes, but interestingly
Like the earth as a heliosheath surrounding it that deflects the effect of the solar wind the sun has a similar heliosheath that the spacecraft passed exposing it to the galactic wind effect
the galactic wind could cause this slow down and be stronger than thought but as the images that nasa have produced with relevance to it show that this spacecraft was heading in a direction towards the galactic wind so its effect would be to deflect the spacecraft back and not directly point to dark matter being of any relevance

Dark matter is only another possibility that is required to prove theory anyway

Dave

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Message 4387 - Posted: 26 Oct 2004, 13:00:04 UTC

opps heliosheath sould read as Heliosphere

theres more reading on it relating to the drift of the space carft at

http://quest.nasa.gov/sso/cool/pioneer10/general/pmtwotxt.html

nothing to do with dark matter though

Dave

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Message 4401 - Posted: 26 Oct 2004, 15:02:12 UTC

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Raphael Lesage

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Message 4410 - Posted: 26 Oct 2004, 15:21:35 UTC - in response to Message 4401.  

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Message 4424 - Posted: 26 Oct 2004, 17:45:37 UTC

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Profile Jim Baize
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Message 4571 - Posted: 28 Oct 2004, 18:21:59 UTC

This is what I see in the Big Bang Theory. You are all looking at this theory through our current understandings of 3-d space. The problem is when you get to such high gravitational energies, gravity will actually bend both time and space. So, you can't look at the big bang as some big blob in the middle of infinite space, because infinite space did not exist at that moment as it does for us today.

It is really a stretch to try to let go of our current understandings of time and space to try to imagine this phenomenon. I have not accomplished this feat, although I continue to try.

Jim
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Message 4575 - Posted: 28 Oct 2004, 20:37:07 UTC

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Profile Thierry Van Driessche
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Message 5907 - Posted: 22 Feb 2005, 20:35:04 UTC

String theorist explores dark energy and our unique 'pocket' of the universe

Date Released: Monday, February 21, 2005


Some celestial bodies are so cold that methane freezes; others are so hot that nuclear reactions occur. And then there's Earth, with a benign temperature hovering in the narrow range between freezing and boiling, allowing the existence of liquid water-and life.

"There's no question that there are many things about the [universe] which if they were very much different, even just a little bit different, life couldn't exist, intelligent life couldn't exist," said Stanford physics Professor Leonard Susskind, who is currently on sabbatical and writing a popular book titled The Cosmic Landscape. "The [universe] is truly an incredibly fine-tuned place."
........
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