Dimensions? How many and what are they?

Answer 1

There is no limit for dimensions.

To define some quantity there are certain parameters needed. It may even infinite number of parameters.

The number of independent parameters are called dimensions.

If there is some relation between two parameters then instead of two parameters one can use a single parameter.

Thus the number of dimensions can be reduced further.

Answer 2

a dimension is simply an added degree of freedom from a coordinate in an arbitrary coordinate system with axis all mutually perpendicular to each other.

and there are zero to an infinite number of dimensions. depending on what you're talking about

Answer 3

Both are difficult to answer. Dimensions generally speaking in physics, are how we traditionally define where something is in space.

As far as how many, no one knows for sure. As far as what we experience in real life or what we can currently see or sense there are four...

up/down
left/right
forward/backward
time (when) which is something of an enigma in itself since we can only experience it as moving in one direction

but there are theories that there are actually more that we cannot detect especially when it involves things at the quantum levels (extremely small)

Answer 4

We live in a universe with three spatial dimensions. For a given coordinate system, they can be expressed as
1) up-down
2) left-right
3) forward-backward

or perhaps
1) length
2) width
3) height

Answer 5

How many? Depends who you talk to. You can have from 0- who knows. Some people say 20 just to give you an idea. They allow things to move around. I don't know much more then that.