Friday, November 1, 2019

nuclear physics - Mass of proton vs mass of nucleus


I have just started reading nuclear physics.I know that the sum of masses of the quarks is less than the proton or neutron itself as a whole . But why is it that the sum of the masses of the nucleons(protons and neutrons) is more than the nucleus itself? whats the difference between the two cases?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...