1. ## Dimensions.

can an object of 2 dimensions exist in a 3 dimensional world? if it could, what would the result of that 2 dimensional object be?

A universe of 1 dimension offers no space to observe through its mere existance...?

What would happen if there was no fourth dimension (time)?

2. can an object of 2 dimensions exist in a 3 dimensional world? if it could, what would the result of that 2 dimensional object be?
Really flat.
A universe of 1 dimension offers no space to observe through its mere existance...?
True.
What would happen if there was no fourth dimension (time)?
We'd all stay young and beautiful.

What brought on these questions?

3. >can an object of 2 dimensions exist in a 3 dimensional world? if it could, what would the result of that 2 dimensional object be?<

A 2d object can exist in a 3d world. If your were to look at the object straight at it's face it would apear normal. If you were to rotate the object so that the face is 90 degres to you the object would disapear.

>A universe of 1 dimension offers no space to observe through its mere existance...?<
Correct.

>What would happen if there was no fourth dimension (time)?
Nothingness

4. Has it even been truly established that Time is a 4th dimension? It just doesn't seem right to me...

5. Time is an unobservable dimension.

Just because something can't be seen by the naked eye doesn't mean that it doesn't exist.

can an object of 2 dimensions exist in a 3 dimensional world? if it could, what would the result of that 2 dimensional object be?
Really flat.
no matter how flat the object is it still has depth and is therefor three dimensional.

Sentaku Senshi falsely claimed:

A 2d object can exist in a 3d world. If your were to look at the object straight at it's face it would apear normal. If you were to rotate the object so that the face is 90 degres to you the object would disapear.
that is complete bullshingles.
If the object dissapears when one looks at it from a "90degree angle" the object does not exist.

and how could you turn the object to look at it? it is 2 dimensional. Turning the object would imply that it has SOME depth. Also, by turning the object, you GIVE it depth (at least in your reference point).

6. Read this. Wait until he gets to the part about time travel.

7. [literal jackass]
if i wait for him to get to that part, he would have to be here in front of me reading the book in so i could wait and still be progressing through the book. If i simply waited for me to get to that point in the book, i would be waiting for eternity, because i would never make any progress in the book, let alone progress to the part that discusses time travel.
[/literal jackass]

anyway, it may herald a look... or a read.

8. no matter how flat the object is it still has depth and is therefor three dimensional.
A plane, by definition, is two dimensional. And it can exist in a three dimensional context. It's hard to conceptualize, because you're not used to thinking of things in that manner.
Turning the object would imply that it has SOME depth. Also, by turning the object, you GIVE it depth (at least in your reference point).
The key word there is 'your reference.' You're right, a plane may appear three dimensional depending on your view point, but that doesn't mean that it's not really two dimensional. Kinda like how a drag queen appears to be female from your reference, but in actuality (s)he's got an Adam's apple and, uh, other equipment.

As for the time travel, granted, it may never be practically possible but, theoretically (at least through some quirky mathematics), it is possible. I for one don't think that we'll ever achieve any sort of HG Wells-ian time machine, but it still makes some interesting reading.

9. Yes, a 2D object exists in 3D world (at least in math). that would be something like a plane, line, etc. For example, a line in the form of
y = mx + b is the same as y = mx + b + 0 * z...

[Pulls out graphing calculator]
you can graph a line in 3D view here

I don't know how this applies in reality (for us), since everything that's here is 3D as far as we perceive it.

10. no matter how flat the object is it still has depth and is therefor three dimensional.
Not always. a 2D object has no depth, that's y it's 2d, in a 3d world, a 2d object would be only seen from 2 view points(the two sides) as soon as you turn the 2d object and look at it from the side, it would dissapear, becuase it doesn't have a Z coordinate for the 3d world to show.

11. in mathematical terms:

http://mathworld.wolfram.com/

and on 4th dimensional geometry:

http://mathworld.wolfram.com/topics/...lGeometry.html

it's all good when you know where to look for reference at times...
maybe...

12. What would happen if there was no fourth dimension (time)
You are not looking at the concept of dimension properly. You can say and be perfectly accurate that pretty much anything that can change is a dimension. All a dimension is a variable, or a "freedom", kinda. Your height, how many sixpacks you have liberated, etc. Time is not THE fourth dimension, but just yet another dimension that is commonly unified with the spatial dimension for convenience in physics.

13. [overwhelmed]

that just gave me one heck of an idea:
if the first dimension were to decease, I mean to be destroyed somehow, then all would be of non existance.
wonderful idea, eh?

[/overwhelmed]

14. good idea toaster, any idea of how we do that? if we do it, maybe, just maybe, it will stop bush from attacking iraq

15. Originally posted by dbaryl
Yes, a 2D object exists in 3D world (at least in math). that would be something like a plane, line, etc. For example, a line in the form of
y = mx + b is the same as y = mx + b + 0 * z...

[Pulls out graphing calculator]
you can graph a line in 3D view here

I don't know how this applies in reality (for us), since everything that's here is 3D as far as we perceive it.