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Originally Posted by KickAssClown
Well, I mean just that. Theorem of Mass-energy, and matter.
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As Craig mentioned, you most probably mean theory or explanation.
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Surely mass and energy are decently defined in physics, however their definition is still far from comprehensive.
You can search the physics books all you like and what you will find for mass-energy and matter are models, not theorems. As I have posted previously on this forum is the neglegence in defining and questioning the fundamentals like mass, distance, time, and charge will ultimately lead scientist astray.
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Of course this is questioned, and all the time! Relativity was about rigorously defining what we mean by time and space. Other theories (such as QED) have attempted to elaborate what we mean by charge and mass.
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The main one is mass and matter. Yes, matter has a property that we call mass, and yes it can be measured, but what is it exactly? the fact that matter has this property is what can be called a law. The explination for why it has this property is what can be called a theory.
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First, this is an oversimplification, not everything has mass. Photons and gluons, for instance, do not. Of the force carrying bosons, only the W and Zs have mass.
Second, the standard model does have a theory of mass based on the higgs/Anderson mechanism.
-Will
