what do you think you know about physics, physics is the study of matter under the effect of energy, but does this includes solid states bodies, atoms at ground states, object at microscopic size or object moving faster than light? these and more is what prompt me to ask again what is physics?
Protons are made up of three quarks , two up quarks and one
down quarks, this why it is called a baryon, meaning a hadron with thee quarks.
A hadron is any particle with only three quarks.
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