Over 90% of the mass of baryonic matter is actually in the form of the relativistic kinetic energy of quarks. They’re moving at very close to the speed of light and so their proportionally small mass is amplified by the inherent increase due to relativistic effects.
At Absolute Zero everything falls apart..............
“Over 90% of the mass of baryonic matter is actually in the form of the relativistic kinetic energy of quarks.”
We have models from which we can make calculations but in truth energy and matter are interchangeable.
We really don’t know either.