Why do we assume that the other 6 dimensions that are curled up are spacial

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The discussion centers on the assumption that the six additional dimensions in theories like M-theory are spatial rather than temporal. Participants argue that spatial dimensions are necessary to reconcile the forces of relativity and quantum mechanics. The nature of time as a dimension is questioned, with references to the space-time framework in relativity. The conversation highlights the complexities of higher-dimensional physics and the role of strings and branes in defining these dimensions.

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Why do we assume that the other 6 dimensions that are curled up are spatial dimensions? Could they not be dimensions of time?
 
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Originally posted by Jack
Why do we assume that the other 6 dimensions that are curled up are spatial dimensions? Could they not be dimensions of time?

The other spatial dimensions arise out of necessity when one wishes to explain all of the forces in a manner that pleases both Relativity and QM.

They couldn't all be temporal dimensions, because time dimensions work slightly differently than spatial ones, and the physics of higher dimensions (in such theories as M-theory) require the spatial kind of dimension.
 
plus these extra dimensions come from strings/branes twisting and vibrating and whatnot, so spatial dimensions are required for these "spatial" components.
 
wait ...why do we assume that time itself is a dimension...I know its because of the space-time notion in relativity...why don't we believe that time is spatial...I know its a common stupid question...so please try to control your words...thanks...
 

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