I know very little Relativity, Special or General.
And my knowledge of Quantum is thinner still.
I have a pretty good grasp of Newtonian mechanics, but don't delude yourself that you can make any progress whatsoever in modern physics until you are comfortable with Classical. But the Einstein equation is very easy when expressed dimensionally. And by "dimension" I mean units, not coordinate systems. That's critical.
E = Mc^2
E = kg (m/s)^2
or
E = kg m^2 / s^2
The unit for energy, kg (m/s)^2, is the Joule.
I've never heard of U, before. Neither has anyone else. Did you just make that up?
Oh, and by the way, none of this (from your post above) makes any sense
In other words: Energy = (u/k)c
M= (U/k)/C
E= (U/k)*C
C=300,000,000 m/s
U= (300,000,000 * k^2) / M
k=m
MY calculation
If m=2…… U= 2^2 = 4 * 300000000 = 1,200,000,000 /2 = 600,000,000 * 300,000,000 = 1.8*10^17
Einstein’s formula; E=mc^2
Calculation
300,000,000 * 300,000,000 = 9*10^16…..* 2 = 1.8*10^17
Its all gibberish, Johannes, it makes no sense at all.