Natural Science Forum / Physics / Particle Physics / April 2006

$$                  MKSA SI mass ..(CODATA NiST mass).
$$       The *iNTERNATiONAL (STANDARD)* definition of "mass":
$$  "Mass is ANY QUANTiTY expressed in GiORGi MKSA (SI) kilograms".
Re:         [ i.e. Mass is what SI "kilograms" measure ].

$$                  Smaller (Not-so-GR-Black) Holes.
$$  Light CANNOT escape a GR Black Hole of sufficiently LARGE mass.
$$  [This means the SPEED of light is a SOURCE-dependant variable].
$$  [Which means light CAN ESCAPE a sufficiently SMALL Black Hole].

$$  Light "fixed" to a meter (at-a-distance) is OBSERVER-dependant.
$$  [Which means the VELOCiTY of light is ALSO OBSERVER-dependant].

$$  Especially, m = E/c^2.   ```Brian A M Stuckless, Ph.T (Tivity).
Re: [There is NO mass, NO matter and NO momentum in REAL geometry].
Re: Especially NOTE, a SPACE where a BiG Black Hole is isN'T EMPTY.
Re: And, the SAME is true for SMALLER mass (Not-so-GR-BLACK) Holes.
Re:           [ i.e. Mass is what SI "kilograms" measure ].