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# Physics/Dimensions

Question
What are the correct terms for the first three dimensions:
Line or length? I have seen both terms mentioned, but only line makes sense, as you can put it on any plane.
IS the second D correctly called surface or plane or width?
is the third correctly called Sphere, cube or volume?
Can a  curve only exist in the next dimension up? i.e, a curved line has to be in the second dimension as it needs to sets of coordinates.  a curved plane needs volume.
What would a curved volume be? Spherical geometry? Does it require time as a dimension?

Finally, is there any mechanism that would cause one dimension t begin unfolding into another

Thanks
Jeremy

A line is a geometric object.  Length is a quantity.  A surface is another geometric object, so is a plane.  Width is a quantity (a linear quantity).  Spheres and cubes are again geometric objects, and volume is a quantity that geometric objects like spheres and cubes enclose.  Yes, curvature can only exist with a higher dimension, there is no perception of curvature in a single dimension or within the number of dimensions of confinement...withing that (say on the surface of a sphere, which would be 2D), only distance matters.  "Curved volume" is kind of not specific, but yes it requires a fourth dimension.

The last question makes no sense to me, sorry.

Physics

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#### Dr. Stephen O. Nelson

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