Do you believe that the fourth dimension exists?

In physics and mathematics, a sequence of n numbers can be understood as a location in an n-dimensional space. When n = 4, the set of all such locations is called 4-dimensional Euclidean space.

Such a space differs from our more familiar three-dimensional space in that it has an additional dimension, a new direction in which movement is possible. This fourth spatial dimension is a concept distinct from the time dimension in spacetime.

As far as I know. Yes there is. Time is the 4th Dimension and can be manipulated just like the other 3 Dimensions if you travel fast enough for example... The Super-massive Black Hole at the centre of the Milky way can alter time so much due to the speed at which celestial objects orbit it (Not past the Event Horizon) that if you go around it once which wouldn't actually take too long ironically enough time slows by 50% overall (Half). Stephen Hawking devised this idea of thinking, I have saw it on TV.

Many think the fourth dimension is time. If that's so, then we already experience it. Physicists claim the Big Bang created a universe with 11 dimensions, but as it cooled, it "cracked" into two separate entities; one of 7 and one of 4 dimensions; we live in the latter. If you're really interested in this, Professor Michio Kaku has a couple books that put theoretical physics on a relatively easy to understand basis. (Still a bit over my head, but he's interesting reading.)

Yes. Time.

Space-time is 4-dimensional; 3 space-like, 1 time-like.

It's used in both Special and General Relativity to describe the geometry of the universe. Mathematically 4-vectors are used to calculate all sorts of things in a similar way that 3-vectors are used in 3-D space.

It's these calculations that allow us to work out all sorts of complex gravitational fields, and the curvature of space in the presence of mass. It also copes with the various essences of relativistic relationships, such as Lorentz time dilation and length contraction.

So we can observe a 4-D universe, and there are also (still inconclusive) ideas that need 11 dimensions to describe the symmetries of the early universe in the moments after the big bang.

Isn't the 4th dimension where the angels dwell?

It is everywhere. We are on a small planet in th universe. You can't measure it. When your spirit is open to see & be aware of the more that the 3rd dimension we are aware of you might have some interesting experiences. I have had many.

The fourth dimension is time. Everyone knows this. If you think it doesn't exist, just watch a clock for a minute. If the time does not change, then time does not exist.

The fourth dimension is time and as I was here yesterday and have a reasonable chance of being here tomorrow I tend to believe in it.

The 4th dimension is Space/Time.

In mathematics perhaps. So far "time" has only been used in quantum physics as a simplifier of the equations. You can still work without it.

And yes, I expect thumbs down.

Yes. It's called time. We cannot perceive it, yet we live in it, granted one exists longer than an instant.