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really "quantization"



James McLean wrote

=3D=3D>But charge comes only in multiples of a single fundamental amount,=
=

=3D=3D>while as far as I know the same is not true of mass.

True, but outside of high energy situations (which on the Earth means =

outside of particle accelerators and cosmic rays) everything is made of =

up and down quarks, which although quite similar, are clearly different.
The mass of the d quark is 1.4 to 4 times the mass of the u =

(as of the 1992 Particle Properties Data Booklet)