It’s not an amalgam (that means a mercury alloy) or any metallic alloy. It’s an oxide (more complicated than that but there’s more oxygen atoms than metal atoms).
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E=mc^2 cosh(eta)
where eta is the velocity parameter. https://en.wikipedia.org/wiki/Proper_velocity
In terms of the coordinate velocity v,
E=mc^2 cosh(atanh(v/c))=mc^2 / sqrt(1-(v/c)^2) = mc^2 (1 + 1/2 (v/c)^2 + 3/8 (v/c)^4 + ...
So mc^2 is the irreducible energy due to mass and isn't relevant at low speeds because it doesn't change; the first-order approximation of kinetic energy is just 1/2 mv^2 and higher order terms aren't significant at low speeds.
> The name Sgr A* was coined by Brown in a 1982 paper because the radio source was "exciting", and excited states of atoms are denoted with asterisks.
And containers that IBM invented on mainframes.
if-then-elseif-else switch-case for while until functions methods classes
and good luck figuring out which matches which when there's more than a screen between the beginning and the end of a block