how many dimensons are discovered?

Answer 1

4 dimensions.

Length Width Height. <- Give everything its characteristics
Time <- cause you can never go back. everything keeps rolling along the timeline.

Answer 2

Sorry if this explantion is too simple. Starts easy and gets a little bit deeper at the end.
The only dimensions you can really count on are the three spatial dimensions and time, the so called 4th dimension.
The three spatial dimensions can be defined in a number of ways by defining a "basis" that describes points in space.
For example, if you are sitting in a room, and are looking at a spot on the wall, you could define "forward and back" relative to the direction you are facing - mathematicians usually call this "x". Then there is "left and right" which, again they would usually call "y". And finally the "up/down" dimension, often called "z".
So if the spot in the wall is, say 3 meters directly ahead of you and about one meter to the left, then 2 meters up the wall, you might describe it as (3, -1, 2). Your location is kind of like a base and is zero meters from yourself so you would write it (0,0,0). The -1 in the second place is really just an agreement among mathematicians that down, left and back are minus numbers, from your (0, 0, 0) position.
Time as a dimension is kind of hard to wrap yout mind around at first, but all it really means is that if you start the stop watch at 0 at your position (0,0,0), and something is moving then maybe at some later time (one second later), its moved to (1,1,1). A kind of diagonal path from where it started. But its one second later so they add an extra second onto it. It started at (0,0,0,0) the last zero is time. And ended up at (1,1,1,1) the last 1 indicates that 1 second has elapsed.
This representation of 4 dimensions has solved a lot of problems in math and physics about speed and acceleration, no to mention quantum, mechanics and general and special relativity.
Its also worth mentioning that the three spacial dimensions need not be the (x,y,z) mentioned earlier. You could just as easily defin that point on the wall by two angles (horizontal and vertical) and a distance. In fact there are theorems that describe what kind of bases you can use. The above are just two examples.
Thats math 101.
If your question is about string theory and curled up time dimensions and stuff like that, well its a lot more murky. I'm way out of my depth here, but it goes like this.
Basically, these physicists want to come up with an elegant model of the universe that if you were to solve any give aspect, would correctly describe ( and more importantly, predict) the behavior of the known universe. Probably the greatest problem of our generation.
They've identified 4 basic forces that act upon everything that we know about so far. Electromagnetism (for example, static eletricity, the stong and weak nuclear forces (google it - its about how atoms interact), and gravity ( I assume you've heard of it).
The main problem is that they want to show that these four forces are actually manifestations of some master force, for want of a better word. And the ｆｌｙ in the ointment has been gravity.
I read the science mags and there are more theories out there than you can poke a stick at.
String theory WAS popular and purported to solve the necessary equations, but only under very special conditions. Its also essentially untestable as the energies needed to reveal these hidden dimensions that make the theories work are astromomical. It involved anywhere from 9 to 12 dimensions. (Correct me if I'm wrong). These are all essentially undetectable at the present level of technology and are likely to remain so for the forseeable future.
Other concepts like "symmetry" - the idea that certain physical properties are essentially identical - i.e they have the same result and can therefore be cancelled out or considered to be the same thing, reduces the number of dimensions involved in these problems, but doesn't come close to solving them.
I'll just mention one other interesting dimension, that I've thought about a bit. (math major). Complex numbers. You've heard of square roots? Square root of 4 is 2. Square root of 25 is 5. The opposite of a square. Of course the square root of 1 is 1.　But what is the square root of -1?　Euler posed the problem and came up with the symbol "i". i^2=-1 Gauss and others later provided more rigorous proofs. Is "i" a number? What does it represent? Modern mathematics would not exist without it but practical solutions to real world problems include it as a transition al step in solving a problem. In that sense it seems to be a dimenson "perpendicular " to our everyday real numbers.Mathematics abounds with situations that require an arbitrary number of dimensions to solve problems.

My simple answer would be that we can rely on our 4 space-time dimensions, and to a less physical and more esoteric sense, an uncountable number of other dimensions, that may be merely mathematical constructs or subtle manifestations of the "real" universe. The connection between the two is beyond the bounds of your question.

Answer 3

4, how many are theorized? Last I heard 11 or 26 (I like 11)

If you could bloody go back it wouldn't be a dimention. You can go back, forwards, up, down, sideways, as much you want in time. Time is is fluid, a tempest in the mists.

And we know how to time travel, we just don't have it implemented yet.

Time is nature's way of keeping everything from happening all at once. Past, present and future are only an illusion

Answer 4

it's a little bit more complicated than x, y, z, t ... it's called String Theory :

I also heard the number of 10, 11 and now 26 dimensions (see the link). in fact, theories with 10 and 11 dimensions are the same ...

you can also look for 'Euclidean Universe', 'Multivers' (on google) and read issues from Colin Adams, Joey Shapiro and Max Tegmark
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post scriptum for groobleman : it's not an isoteric theory ... it's just sciences

Answer 5

it depends on how u mean there. in drawing sense here's how someone explained it to me. u start out with a line (first demension), square the line and you get a square (second demension) square a square and you get a cube, (third dimension). now how do you square a cube? this is where you get into a tesserract theory. and it involves your five senses. look up tesserract on google images and u get sum interestin stuffs.

Answer 6

I recall the 5'th dimesion, they were on the Motown Music Lable

Answer 7

Time travel is possible. Einstein proved it.

We just have not discovered how to do it.

Theoretically there are unlimited quantum realities coexisting with us. Study quantum physics if you want ot learn more.

Answer 8

four, the fourth being time (when a 3 dimentional object is in a position)

as for time travel, worm holes and black holes and stuff...interesting but i don't get it!!

Answer 9

Height
Weight
Length

Time/Space Everyone says time, but actually time and space are intertwined.

Answer 10

Depends on what you're smoking.