These feel good. Targeted at upper undergrads, so he says he holds back on some stuff, but gives a good level of detail for people who have a life.
- Are there more than 3 generations of particles in the Standard Model? | 51
- Dirac equation | 329, 2k, 38
- Klein-Gordon equation | 243, 496, 1
- Quantum chromodynamics | 93, 230, 11