Do 4-D objects exist in real life?

Question

If so, some examples? Or a quick explanation. Thank you.

Answer 1

No

Objects are three dimensional.

The fourth dimension is the interaction of time.

With regard to time you are capable of observing one, two, or three dimensional objects move in linear, and non linear velocity's through the interaction of motion, over measured fourth dimensional time observations.

Answer 2

In relativity, time is thought of as a 4th dimension. But if you mean 4 space dimensions, then 4-D objects do not exist since space in our universe is 3 dimensional.

Some string theories claim that space at the very smallest scale is actually 9 or 10 dimensional. But even if this is true, space at the scales we can observe is definitely 3 dimensional.

4-D and higher dimensional objects can be useful in mathematics though.

Answer 3

In mathematics (and physics) a dimension is something that you use to describe an object. You are allowed as many as are necessary for a full description. Take your nose, for example. It has a location in x,y,z. space. But it is probably moving, so it has a velocity vx, vy, and vz. And if is moving it must have been accelerated so you have an ax, ay and az. That is nine dimensions just to find your nose. Does it have temperature? Ah, ten. Just keep adding dimensions as needed to make a full description and don't get bogged down in metaphysical stuff. And avoid Hawking, who will tell you that your nose is actually a string. If you are having conceptual problems with multiple dimensions, a string nose will be hard to handle. No pun intended.

Answer 4

Pretty much everything is 4-D since it also has to exist in time.

Doug