extradimentions, survivable? and other higher dimention fun

if i built the mother of all generators and generated enough energy to decompactify a dimention from the planick length to big enough to fill a room. would i be able to survive in there? assuming the intense energy in there was some type i was involunrable too, maybe magnitism or something.

how about if i decompactified all the dimentions?

i think i would die pretty quickly as all my blood would leak out through the extra dimentions. a square can not do what a cubes does in thre dimentions.

what if i did survive and built something with more then three dimentions and then turned of the genenerator and let the extradimentionsrecompactify. what would happen to it? would be crushed back to thre dimentions (think random pieces of it just appearing in random spots in 3d space)?

I think someone’s had enough. :wink:

I’m not sure I understand most of your questions, though. If there were a fourth extended spatial dimension, I don’t think you’d be aware of it. In the (excellent) book, Flatland, the two-dimensional flatlanders were unaware of the third dimension. If you can find a copy, it gives a good starting point for understanding higher dimesions.

Going on Q.E.D.'s version of the question. I think it depends on whether a fourth dimensional force can act on a third dimensional object (that is equivalent to a four dimensional object with zero width in one direction). Since the three dimensional object cannot exert any force in the fourthdimensional direction, it will be completely at the mercy of the component of any fourth dimensional force in that direction.
Or from the Flatland perspective, if our three dimensional photons could interact with the two dimensional Flatlanders, then our photons would rip the Flatlanders into disjointed two dimensional bits. In essance the insides of the two dimensional beings would fall out into the third dimension.
Cheers, Bippy

The big problem with four spatial dimensions is gravity. In 3 dimensions, gravity diminishes as 1/g[sup]2[/sup]. But in 4 dimensions, gravity diminishes as 1/g[sup]3[/sup]. In general, if n = # of dimensions, then you have 1/g[sup]n-1[/sup].

In four dimensions, therefore, orbits are not stable. You can’t have planets. In fact, it’s worse than that. You can’t have electron orbitals.

And this is true in all higher dimensions as well. Orbits are only stable in 3 dimensions.

Please don’t uncompactify anything. It will make the Board very hard to read.

For a book that lays this out in interesting fashion, take a look at The Constants of Nature: From Alpha to Omega–The Numbers That Encode the Deepest Secrets of the Universe, by John D. Barrow.

Uh, one quibble - so far as I know, electron orbitals don’t use gravity, but the attraction of the negatively charged electron to the positively charged protons in the nucleus. So your gravity equation doesn’t apply here. Maybe that attraction scales the same way as gravity, I don’t know - but the gravity thing surely doesn’t apply. Er, right?

let me restate my question, sometimes my writings is not the clearest in the world.
at 10^-33mm (what i think is called the planick length) according to m-theory there are 6 compactified dimensions. if one were to generate enough energy one could decompactify these dimensions. magnitism seems to have little affect on people.
anyway regardless of how i make the extra-dimentional room. would i suvive in there? i don’t think i would. to use the flat landers as an example. the flat landers would have no skin on the top (and a very digusting gigestive system i might add). the new possibility of up woule let all their blood flow out and they would die.
the higher dimensional fun. lets say i survived and not only that i couls interact with things in there. lets say i built a hyper cube and then returned the room to 3 dimensions. what would happen to the hyper cube in there?

all right since you ask nicely, but i was so looking fowward to it.

thanks i think i might get a copy.

I’ll also recommend The Elegant Universe, by Brian Greene. It’s an excellent treatise on superstring theory and M-theory and nicely covers the concept of “curled up” dimensions and the reasons for them.

Mr. Excellent, I can see that it came out confusingly, but the “In fact, it’s worse than that.” was meant to signal a new thought. Orbitals fail for analogous reasons.

I know when I die that’s how I want to go: With my blood leaking out through the extra dimensions :D.

Is this the book you’re talking about?
http://www.geom.uiuc.edu/~banchoff/Flatland/

IIRC, Slaughterhouse Five also addresses the concept of multiple dimensions.

I’m sure Stephen Hawkin must have written something on the subject.
I don’t think it’s possible to conceptualize 5, 6, 9 whatever dimensions other than as a mathmatical abstract. If you went from 3 to 2 dimensions, you can’t exist. You wouldn’t be crushed because smashing you flat would still have a thickness.

In short, i don’t think there is a reasonible way to answer the question.

Greg Egan seems to think that a kind of matter might be possible in 5

5 dimensions (blink! what was that?)…
take a look at this…
http://www.netspace.net.au/~gregegan/DIASPORA/DIASPORA.html


SF worldbuilding at
http://www.orionsarm.com/main.html

Rudy Rucker’s The Fourth Dimension (And How To Get There), which draws heavily from Abbott’s Flatland is a must-read too.

The downside being that it seems out of print.

Thanks QED I will l see if the library has a copy.

I was thinking about it a lot. I think as the extradimension recompactified it would ether distort the hyper cube till it fit in three dimensions or compress the hyp cube down to 10^-33mm making it a micro sinuglarity that would eventially evaporate.