Do you think time is another dimension?
487690
Yes it is it is used in so many constants and in so many formuli everything revolves around time. Even though it is not  their to be seen it cotrols our lives in such a big way.
600049
The three dimensions they are most likely talking about are the x,y, and z planes in space. Time is the fourth dimension, and there could be more after that. read stephen hawkings book A Brief History of Time. He explains how to conceptualize dimensions in your head very well.
1094557
"The mathematician Hermann Minkowski, and ultimately Einstein as well, advocated thinking about time as another dimension of the universe - the fourth dimension - in some ways quite similar to the three spatial dimensions in which we find ourselves immersed. Although it sounds abstract, the notion of time as a dimension is actually concrete. When we want to meet someone, we tell them where 'in space' we will expect to see them - for instance, the 9th floor of the building on the corner of 53rd Street and 7th Avenue. There are three pieces of information here (9th floor, 53rd Street, 7th Avenue) reflecting a particular location in the three spatial dimensions of the universe. Equally important, however, is our specification of when we expect to meet them - for instance, at 3 P.M. This piece of information tells us where 'in time' our meeting will take place. Events are therefore specified by four pieces of information: three in space and one in time...In this sense, time is another dimension."
1071518
Time And Relative Dimension (or Dimensions) In Space
922393
In order to have space one must have time. In fact, I consider time to be the root dimension. Without time in which to percieve the universe, I cannot see how there could be a universe. Time and space are inextricably linked.
128525
I don't think that is correct.   I assume you mean fourth spatial dimension, rather than the Minkowski 3 space, 1 time geometry of relativity.  For that, time is actually a dimension, and the question pretty much answers itself.\n\nThe best insight into a spatial fourth dimension is to read the delightful classic little book, "Flatland". Almost any library or bookstore should have it. It works on the analogy of an individual who lives in a two dimensional world - his name is "A. Square" - who learns about three dimensions.\n\nAnother way to insight would be to look up "tesseract" on a search engine. Aside from hits on Madalyn L'engel's misuse of the term in her children's boooks (avoid her description), you should find many discussions on how to represent simple four dimensional objects in three dimensions, just as we represent three dimensional objects on a flat piece of paper with perspective.\n\nFour dimensions would have two directions that are perpendicular to our three dimensional world. They have been given the names "ana" for four dimensional "up" and "kata" for four dimensional "down" with respect to our space. Of course these are just the Greek words for up and down. \n\nSo borrowing a description from Flatland, if a four dimensional sphere were to start anawards of our world and move through it in the kata direction, what we would see, as it intersected our world woild be first a tiny three dimensional sphere (cross section of the four dimensional sphere near its kata pole) which grows in size to a maximum (the "equator" passing through), and then decreases gradually again to its mini size before vanishing, having passed commpletely through our world and out the other side.
1045387
GOOD QUESTION: well done! There is not really any such thing as time, it is merely our way of describing a particular abstract concept. If it was a solid physical reality it surely couldn't be relative. Lets all go and read Einstein and try to figure it out!
494471
Kemmy's answer is actually a very good answer.  It seems simple, but it's quite insightful.  Time is referred to as a 4th dimension (along with the three spatial dimensions) because you when you represent physical situations using geometric coordinates (x,y,z,t), you can treat time 't' in the same way as you treat the spatial coordinates x,y and z.  In fact, many physical laws such as special relativity are significantly simplified if you treat time in the same way as the spatial dimensions.\n\nHowever time is obviously very different in some ways:\n\n1. Units are different (seconds instead of meters, feet, cm)\n2. You can only move in one direction along the time axis, whereas you can move backwards and forwards along the spatial dimensions.\n3. Entropy (disorder) increases only increases with time, but seems to have no relationship with space.
349330
of course it is theoretical. It is like my answer to another question, what contains the Multiverse? "What's after that?" I had said. It is theoretical and we like to think that the universe has a finite space and something holds our universe with another finite space. We like to think this way because that's the extent of our view and understanding. We live in the 3rd dimension and we can only understand physical things in the third-dimension. We can only have so much understanding on our universe that everything about it has to be based on theories. Even the fact that the 4th dimension is time is not really a fact, but still a theory because we can't think in that dimension. We haven't been through the 4th dimension (i know the theory is that we're going through it in one direction but it still is a theory). Our understanding of our own universe is very limited because we live in a finite world.\n\nAnd it doesn't answer your question, i know. But I like to think of the multiple universes that you're talking about as the Alternate Universe theory where something doesn't happen in this Universe, it happens in another and if it is this case, there is almost infinite number of them. And the wormhole thing works with Einstein's theory of Relativity as a Super Massive Black Hole is strong enough that it bends the space-time continuum so much that it will make an advanced dimensional hole in another (if not all) universe. I devised an un supported theory that that hole created by the black hole is actually a 6th dimension because it disappears as matter from the universe then exist in another. A total violation of the law conservation of matter unless it actually goes through a wormhole, which would go with the theory of relativity AND conserves matter. But it still is a theory that I accept.\n\nPS Penguins!!!
77429
we might die  the 4th dimension IS time
69551
Scientifically, time actually exists as a dimension, but a non-spatial one. Our perception of time may not be necessarily cover the whole concept of what time is. It could be possible that time is some type of "substance" even. But it exists as far as the universe and physics is concerned.\nSince our human experience only covers the present time as a "linear continuum", it's hard to understand time in terms of "existence". It's better to try to define first what "existence" means.\nFor example, for the Taoist, nothing actually exists.\nIn my opinion it's better to come up with a reasonable answer to the question then just put that baby to sleep, because you can throw away your time on a philosophical wild goose chase.\nYou can read "The Elegant Universe" and it'll be so mind-boggling that it might make you not worry about it too much.
1134654
We observe four dimensions everyday, three spatial and time.\nTime is called a dimension because it makes mathematical sense to do so. \nBut...theories such as string theory predict that the space we live in has in fact many more dimensions (frequently 10, 11 or 26), but that the universe measured along these additional dimensions is subatomic in size. As a result, we perceive only the three spatial dimensions that have macroscopic size.\n\nThis is not so strange as it sounds, which I'll show with an example. Imagine you are in an airplane, flying over sea. Seen from a height, the sea looks flat, two-dimensional. But when the plane looses height we start to perceive the waves, that move in a third direction we could see before.\n\nThe universe could be the same. Four macroscopic dimensions and a few more, hidden ones. We can only perceive them for instance, by the small effects their existence might have on subatomic particles.\n\nSerious enough?\nThe reference is a general article on the mathematical notion of dimensions, that contains links.
1008589
yes time is the 4th dimension and it is not constant time slows when speed increases eg if you could fly at or near the speed of light time would slow down for the pilots relative to people staying on earth
766666
nope....that's the interesting thing...you are doing a "thought experiment" but reality actually looks different. The problem is that our thinking can only think in that time-space concept as we live it. But is a mental construct. \n\nSo - first of all - we are as limited as a being which lives in a paper plane and just can't see or understand or grasp us, 3D beings. \n\nSecond - if you are looking to think about time travel rather try it with ideas like "slider"....which is a TV show dealing with parallel universes. Because that is basically what i is. \n\nEverything exists...the dead grandmother, you, at the same "time" If your grandma dies in one universe it will develop different there. But it has no impact on this universe where you live.  Simply speaking. There is no way "to cross" into another universe because also those are some kind of "construct" and not as real as your brain wants to imagine them. \n\n(It's like the funny thing that people always think they can see and touch atoms if they just go small enough...but all what's left there is energy, no solid matter, really. Physicists describe those "particle waves" as wave functions....)
31234
Einstein said we are living in the past time, that means we have not "now time"!\nSo, nobody can not answer, what time is it! maybe we can ask, what time was it!!
187337
how can something without a boundary, like the universe,  have a center?\nand yes, time is subjective. basically i think it's only a measurement of life.
182923
Yes. But, it's just a personal assumption, although it is an assumption held by the majority of people.\nThe most well known 4 dimensions are best described as width, length, depth and time. The order you list them does not matter, and there could be more - but humans have difficulty relating to more than these 4 (apart from imagining what they are like). The easist way to explain what a dimension is, is to say that you need all 4 to describe where an object is located.... eg, as a real world example I could tell you that I am located in a building at a certain cross-street (=length+width), a certain floor (=height) and at a certain time. You need all 4 dimensional descriptions to find me.\nTime is definitely the hardest of the 4 to properly comprehend. It's hard to think of time as being similar to length or width or height. It is special for sure to us humans, but that is only because our brain operates as a function of time... which means we are fooled into the perception that time 'moves'. Time does not move, no more than 'length' moves. You mind changes with time, just like the slope of a hill changes with height, but there is nothing to suggest that there is a certain special moment called 'now' that is somehow different to 'the future' or 'the past'. Read any scientific article on the topic if you really want to find out more about this 'special' dimension (see source link for an excellent read).