I learned in this video and in this answer that electrons repel from each other by exchanging photons. This makes sense when it comes to electrons, but what happens when two protons or two positrons repel each other? Do positively charged particles also exchange photons?
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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 \...
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Consider a compound pendulum pivoted about a fixed horizontal axis, illustrated by the force diagram on the right: # Okay, I can't figur...
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I was solving the sample problems for my school's IQ society and there are some I don't get. Since all I get is a final score, I wan...
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In the crystal, infinitesimal translational symmetry breaking makes the phonon, In ferromagnet, time-reversal symmetry breaking makes magnon...
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