is the world three dimensional? if so why if not why?

Question

pls help.

i just need to know how the world is three dimensional.

Answer 1

As I'm sure most answers will tell you, it isn't 3D. It's 4D.

Three D: x, y, z or depth, width, height or latitude, longitude, altitude etc. In other words, to fix a position in space, we need three values (e.g., x, y, z). In math talk, we show this as p(x,y,z) for that point in space. For example, to locate an aircraft on Earth, we need to specify it's longitude, latitude, and altitude (or some equivalent 3D metrics). [NB: "space" here does not mean outer space; the term simply connotes any point in three dimensions...as opposed, say, to a point in 2D, like a pencil point on a piece of paper.]

But, wait, that aircraft is moving (about 600 mph); so, to really locate where that plane is in space we also need to specify WHEN it was there. And that's the fourth dimension...time. So we can say the airplane is at Lat, Long, Altitude at 10 PM on September 24, 2007, and that pin points where as well as when.

With time, we can do all kinds of descriptions we would not be able to do without it. For example, we can specify a change in spatial position (delS) that occurred in some interval of time (delt). In math talk, we can write this as delS/delt; where the del* simply means "change in *" whatever the * is.

And delS/delt has a special name we give it. It's delS/delt = v = velocity. Something we could not write without that fourth dimension...time. Acceleration, which is delv/delt = a is yet another physical characteristic we could not describe without time. Bottom line, we are a 4D world because we need all four dimensions to properly describe the physics of our world...and the whole universe for that matter.

Answer 2

Yes. It is three dimensional. The only question is how many more dimensions it also is.

Answer 3

The world has certainly has at least three dimensions if that's what you mean.

It also has a fourth dimension (time).

It may have more than that (a topic of ongoing research and speculation).

Answer 4

Yes, it is. It has depth, length, and width, which makes it 3 dimensional.

Answer 5

if you are not clear with the concept here is an eg:
when you jump forward what happens???you move in two(x and y axis) direction and you another direction

Answer 6

The three dimesions are:
length
width
height

Apply to your question.