You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar

Speciality Forums >> Science! Astronomy & Space Exploration, and Others

Pages: 1 | 2 | (show all)
CharlesW
professor emeritus

Reged: 11/02/12

Loc: Chula Vista & Indio, CA
String theory and gravity
#5617289 - 01/11/13 01:30 PM

I'm not a physisist so please take it easy on me. I've been watching the Sky At Night series on Youtube and they had a short discussion about string theory and gravity. It was the, "Our gravity might not be as strong as we think it should be because it is leaking into adjoining dimensions," argument. Assuming that this true for a moment and our gravity is leaking into other universes, what is leaking back our way? Or are we the "king of dimensions" and the sun rotates around the Earth, and we don't get anything from those other dimensions/universes?

 Post Extras:
Pess
(Title)

Reged: 09/12/07

Loc: Toledo, Ohio
Re: String theory and gravity [Re: CharlesW]
#5617319 - 01/11/13 01:53 PM

There is a thought that dark matter may be gravity from other branes (a brane is kinda of a flat plane as opposed to a long string. ie: it is a string with length & width but no height whereas a string just has the length dimension).

This idea comes from M-theory and, may be, testable. If high energy particle collisions are found to yield less mass than the starting particles, it is theorized that this extra mass was knocked off 'our' brane into another dimension.

Pesse (In which case the Dimension of Cats would be very happy with all the extra string) Mist

 Post Extras:
scopethis
Postmaster

Reged: 05/30/08

Loc: Kingman, Ks
Re: String theory and gravity [Re: Pess]
#5617472 - 01/11/13 03:35 PM

I think string theory is wrong cause a string can only be stretched to a limit before it snaps..then the Universe will begin to collapse....

 Post Extras:
deSitter
Still in Old School

Reged: 12/09/04

Re: String theory and gravity [Re: CharlesW]
#5617498 - 01/11/13 03:55 PM

Quote:

I'm not a physisist so please take it easy on me. I've been watching the Sky At Night series on Youtube and they had a short discussion about string theory and gravity. It was the, "Our gravity might not be as strong as we think it should be because it is leaking into adjoining dimensions," argument. Assuming that this true for a moment and our gravity is leaking into other universes, what is leaking back our way? Or are we the "king of dimensions" and the sun rotates around the Earth, and we don't get anything from those other dimensions/universes?

And I thought it was just my new diet..

String theory is said to be a theory of gravity because it contains a spin-2 boson. Since the spin-2 boson is not really gravity (it's just the spin-2 boson), all such claims by string theorists are nonsense, and in fact you will never see them cook up a set of equations that reproduce even Newtonian gravity, much less GR.

-drl

 Post Extras:
mich_al
Carpal Tunnel

Reged: 05/10/09

Loc: Rural central lower Michigan ...
Re: String theory and gravity [Re: deSitter]
#5617929 - 01/11/13 08:14 PM

brane == membrane

just sayin

 Post Extras:
llanitedave
Humble Megalomaniac

Reged: 09/26/05

Loc: Amargosa Valley, NV, USA
Re: String theory and gravity [Re: mich_al]
#5618193 - 01/11/13 11:05 PM

Probably at this point better thought of as a meme-brane.

 Post Extras:
Pess
(Title)

Reged: 09/12/07

Loc: Toledo, Ohio
Re: String theory and gravity [Re: scopethis]
#5623044 - 01/14/13 04:42 PM

Quote:

I think string theory is wrong cause a string can only be stretched to a limit before it snaps..then the Universe will begin to collapse....

Pesse (Collapse? or unravel?) Mist

 Post Extras:
scopethis
Postmaster

Reged: 05/30/08

Loc: Kingman, Ks
Re: String theory and gravity [Re: Pess]
#5625171 - 01/15/13 08:47 PM

that indicates that the Universe is nothing more than a big ball of twine....

 Post Extras:
Ira
Carpal Tunnel

Reged: 08/22/10

Loc: Mitzpe Ramon, Israel
Re: String theory and gravity [Re: scopethis]
#5628859 - 01/17/13 08:47 PM

Call the plumber. I can't afford to loose any more mass from my brain.

/Ira

 Post Extras:
Pess
(Title)

Reged: 09/12/07

Loc: Toledo, Ohio
Re: String theory and gravity [Re: scopethis]
#5630296 - 01/18/13 05:34 PM

Quote:

that indicates that the Universe is nothing more than a big ball of twine....

I found an alternate universe!

 Post Extras:
llanitedave
Humble Megalomaniac

Reged: 09/26/05

Loc: Amargosa Valley, NV, USA
Re: String theory and gravity [Re: Pess]
#5630752 - 01/18/13 10:47 PM

Well, don't just string us along!

 Post Extras:
deSitter
Still in Old School

Reged: 12/09/04

Re: String theory and gravity [Re: llanitedave]
#5631363 - 01/19/13 11:18 AM

Do they have good Chicago-style pizza? You can't find that anywhere these days!

-drl

 Post Extras:
Skip
Starlifter Driver

Reged: 01/23/08

Loc: Fort Worth, Texas, USA
Re: String theory and gravity [Re: deSitter]
#5631366 - 01/19/13 11:20 AM

Are you implying that Chicago pizzas are stringy, or that they have lots of gravity?

 Post Extras:
deSitter
Still in Old School

Reged: 12/09/04

Re: String theory and gravity [Re: Skip]
#5631376 - 01/19/13 11:25 AM

If the cheese is right, both!

-drl

 Post Extras:
scopethis
Postmaster

Reged: 05/30/08

Loc: Kingman, Ks
Re: String theory and gravity [Re: deSitter]
#5631884 - 01/19/13 05:08 PM

I do believe Pess is onto something...the alternative Universe twine ball is unraveling and seeping into our Universe..that outta make for a good scientific "yarn"...

 Post Extras:
Postmaster

Reged: 04/28/03

Loc: Atlanta, GA
Re: String theory and gravity [Re: scopethis]
#5632401 - 01/19/13 11:00 PM

Now you're just trying to string us along...

 Post Extras:
scopethis
Postmaster

Reged: 05/30/08

Loc: Kingman, Ks
Re: String theory and gravity [Re: Jarad]
#5633300 - 01/20/13 02:07 PM

it's that term "fabric" of the Universe that is undefined..is it string, netting, some sort of mesh or webbing, or perhaps some large old discarded pelt from that neighboring Universe...

 Post Extras:
EJN
Carpal Tunnel

Reged: 11/01/05

Loc: Between Eigenstates
Re: String theory and gravity [Re: scopethis]
#5633450 - 01/20/13 03:48 PM

Quote:

it's that term "fabric" of the Universe that is undefined..is it string, netting, some sort of mesh or webbing, or perhaps some large old discarded pelt from that neighboring Universe...

The fabric of the universe is 60% cotton and 40% polyester, and should only be
washed using the "permanent press" setting.

 Post Extras:
Pess
(Title)

Reged: 09/12/07

Loc: Toledo, Ohio
Re: String theory and gravity [Re: EJN]
#5634548 - 01/21/13 09:22 AM

I left the Universe on the High-Heat setting too long.

Pesse (Scientists are set to announce that the Universe is now contracting.) Mist

 Post Extras:
llanitedave
Humble Megalomaniac

Reged: 09/26/05

Loc: Amargosa Valley, NV, USA
Re: String theory and gravity [Re: Pess]
#5634888 - 01/21/13 12:41 PM

Was it an accident, or do you have a scorched universe strategy?

 Post Extras:
Pages: 1 | 2 | (show all)

Extra information
2 registered and 6 anonymous users are browsing this forum.

Forum Permissions
You cannot start new topics