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**in physics**. (there are differences in the meaning between physics and mathematics, as far as I understand it)

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As far as I understand it, we live in a 4-dimensional world, consisting of 3 space and 1 time dimensions. Yet we combine them to form 4 dimensions of spacetime?

Does this mean that we only need 4 points to describe

**where**a particle is?

If so, that raises (at least to me) the following question:

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What are the amount of variables needed to completely describe a particle? Is that even possible?

It would seem to me you need more information than just these 4 dimensions to describe something fully. Namely not only

**where**it is, but also

**what**it is.

So what else do we need? Mass, probably? Charge? What else? Can we even assign these things, or do they only appear in relation to other objects? Can we describe a particle fully? If not, what is the maximum amount of information we can have about a particle at any given time?

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Now,

*let's assume*we could describe a particle fully and completely with just 6 variables. 3 for space, 1 for time, 1 for charge and 1 for mass.

What is then the difference between

*space & time*on the one hand, and

*charge & mass*on the other? What makes

*space & time*dimensions, but the other's not?

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I hope somebody a little smarter than I can explain these things to me, or explain to me why I am not asking the right questions if that's the case.