This whole multi-dimensional stuff.

Well there are 2 "multidimensional" things going on here.

One is about there being more than 3 spatial dimensions in *this* universe. The other is about there being multiple *universes* each one with its own 11 spatial dimensions or so.

The word "dimension" became sinonymous with "universe" in the 80's and that baggages carries to these days but the concepts are not interchangable. Different universes are alternate realities. Spatial dimensions are just alternate directions you can move in.

We move in strictily 3 dimensions, but there is a chance that small particles can move in more directions than those. That could explain how some particles can instantaneously jump from one place to another, they may be simply moving normaly in directions we don't know of.

Also, it may be that particles constantly switching between two or more states are simply moving linearly across a small dimension so that what looks like quark alternating between chromodynamic charges is in fact just passively drifting in directions we don't know of.

An those are only spatial dimensions, some string theories predict 2 temporal dimentions (two timelines perpendicular to each other) that could explain some non-local events.

That is COMPLETELY independient to the many worlds interpretation of quantum mechanics. The thing with quantum mechanics is that there is a set of phenomena that are, by all accounts, completely random. Random is not good. Random usually means that we don't understand the circumstances. Einstain's objection to quantum mechanics is that there are hidden variables affecting quantum events and that if we were aware of them we would see that the events are not random. But we haven't found them, and we have looked pretty damn hard for them.


The copenhangen interpretation is that we shouldn't worry about it and just move forward AS IF they were completely random, and many believe that there are still hidden variables. The many worlds hypotesis tries to fix this by suggesting that maybe the randomicity is not in the event but the observers.

So it's not really true that a given atom has a 50% chance of decaying this very
second. What really happens is that the universe splat in two universes, one where it decayed and one where it didn't, but for observers it looks like only one or the other event happened.

That's what the many worlds hypotesis does. It explains away apparent randomiciy at the expense of alternate, unobservable universes. But it has nothing to do with the extra spatial and temporal dimensions of string theory, those, if real, are here and are accesible to us with the apropriate instruments.

And of course there is the crack pot hypotesis that there may be beings in *this* universe who are only aware of those extra dimensions just like we only are aware of the our own 3 dimensions + time. But unlike alter-universes which are just like our universe but with a different history, those alter-dimensional realms would be entirely too different and may be completely devoid of life, just like this realm is nearly devoid of life and nearly devoid of anything in general.

Its mass that creates gravity and that matter is but a factor (I'm not sure myself). Example: of white dwarfs or neutron stars.
Http://en.wikipedia.org/wiki/Gravitation
I doubt I'd fully understand most of this (if I had gone through with reading it all, what I have read is confusing) but I think the first paragraph explains where I am lost.
Http://en.wikipedia.org/wiki/Fundamental_interaction
"The four known fundamental interactions are electromagnetism, strong interaction ("strong nuclear force"), weak interaction ("weak nuclear force"), and gravitation. All are non-contact forces. With the possible exception of gravitation, these interactions can usually be described in a set of calculational approximation methods..."

I've been meaning to read up on this, general relativity, and Equivalence principle, among other things, but every time i try i either become lost or end up over encumber (opening link after link) till my head hurts. I feel i need prior teaching to read most of them. ~sigh~

Edit, I don't understand what exactly is included into space fabric, everything that we know of that exist in the known universe?

u said there where 3 spatial dimension but can u not considered that in those spatial dimension there where another 3 dimension and in those dimension there where another dimension? How come u said there were just 3 spatial dimension? how about i say the were infinite spatial dimension...like in 1 dimension there were 3 dimension and in another dimension there were another 3 an it goes on forever. i can't really say that i have only 3 dimension snce i can't prove it yet. but u also can't prove that there were only 3 spatial dimension.

It's like a person trying to teach other people how to drive a car without ever driving a car.

I'm not sure I understood what you said but no. There cannot be any more dimensions "inside" our 3 dimensions because dimensions are not universes, but higher levels of spatial complexity. In other words, yes there might be more dimensions but they are not "inside" anything.



No, I'm trying to explain why you need a driving license. I'm trying to explain why some physicists favor the many worlds hypothesis. I don't know how they have looked for hidden variables, but I know they have.

It's like looking for dark matter; they have good reason for thinking its there but now they have to prove it.

Actually I think "they have good reason for thinking its there" is enough prof that it's there. There is no question it's there. The question is WTF is it?

When it comes to science you need more than theoretical proof, you need experimental proof. They know its there but they still need to find it in order to have proof.

That's not what I'm saying. A shadow is more direct evidence than what they have on dark matter: a shadow is exactly what they're looking for to prove its existence.

Actually there is a way they can of observationaly proof of dark matter.
What they're doing is they've gone down the depest mines in earth. They use super-cooled sensor nets that detect particles that hit it; the rock when they're that far down filter out every, supposedly, besides dark matter. I know they're looking for more proof because I know that's how they're doing it.

I believe that everything's cause-and-effect. Like if you roll a di, there may be a probability of it coming up as any side, but it -can- only come up one way depending on all the factors ranging from its weight, the way it was tossed, etc. The same mechanic works for our brains, so any decision a person makes is the only one that they could have given enviromental and genetic factors.