2000•Unpublished venueRequires access
On conservation laws and their status in physics
Yang Chang
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Abstract
From the homogeneity of time we can deduce mechanical energy conservation law, and from the homogeneity and isotrogy of space we can deduce monentum conservation law and angular momentum conservation law. There were no sciences without symmetry. Conservation laws are the corner stones in physics, together with elemental laws and various of phenomena they construct the whole physics building layer upon layer.