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To: Mikey

You're right about height, width, depth and time being the standard four dimensions of spacetime. But gravity is not a dimension; it's one of the four fundamental forces, the other three being electromagnetism, the strong nuclear force and the weak nuclear force.

8 posted on 01/09/2005 1:01:33 PM PST by snarks_when_bored

To: Mikey

I should have added that current versions of string theory require that there be additional spatial dimensions (up to 6 or even 7 more). Since these dimensions haven't been observed, it has been conjectured that they're quite tiny (curled up into up into any of a myriad of possible shapes). The present article discusses the possibility of getting experimental confirmation of these extra dimensions.

9 posted on 01/09/2005 1:06:20 PM PST by snarks_when_bored

To: snarks_when_bored
You're right about height, width, depth and time being the standard four dimensions of spacetime. But gravity is not a dimension; it's one of the four fundamental forces, the other three being electromagnetism, the strong nuclear force and the weak nuclear force.

Gravity sucks . . .
11 posted on 01/09/2005 1:12:02 PM PST by Beckwith (John, you said I was going to be the First Lady. As of now, you're on the couch.)

To: snarks_when_bored

Let's say a star is formed a thousand light years from earth. How long before the gravity from the newly formed star reaches earth? IOW, how fast does gravity travel?

15 posted on 01/09/2005 1:32:45 PM PST by Ken H

To: snarks_when_bored

You're right about height, width, depth and time being the standard four dimensions of spacetime. But gravity is not a dimension; it's one of the four fundamental forces, the other three being electromagnetism, the strong nuclear force and the weak nuclear force.

////////////////
however, observation has shown that the structure of space time is bent into "gravity wells" around massively large objects. Here are two sentences. 1.)Space tells matter how to move. 2.)Matter tells space how to bend. Sentence one describes "height, width, depth and time being the standard four dimensions of spacetime." Sentence one describes how we understand reality. However, all four dimensions seem to be subject to something else described in sentence two. The bend or gravity. But why is this bending of space described as a force rather than the character of space itself. It doesn't seem as if space is empty. Rather it seems that if space can bend than it is more like a material.

Either that or our notion of dimensions is a function of newtonian mathmatics. We're biased or our point of view is in favor of space time rather than matter time--if there is such a beast. I'm no mathmatician but I've heard recently some speculation at free republic that this bias had something to do with Newton's work and that it could be rectified or rebalanced by Newton's contemporary, Liebnitz, who did some work with infintessimals, a number system that is built around a one dimensional zero--or something like that. At this point I'm out of my depth.

30 posted on 01/09/2005 4:05:52 PM PST by ckilmer

To: snarks_when_bored
But gravity is not a dimension; it's one of the four fundamental forces, the other three being electromagnetism, the strong nuclear force and the weak nuclear force.

Forgive me if I sound incredibly stupid..

Isn't Gravity simply a function of Mass? ( function, for lack of a better word. )

46 posted on 01/09/2005 10:42:35 PM PST by Drammach (Freedom; not just a job, it's an adventure..)

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