Fun! I'll take a swing (and I'm cheating by looking stuff up): 1. Blackbody radiation per unit wavelength. 2. Momentum. 3. Not sure. Quantum harmonic oscilla

Fun! I'll take a swing (and I'm cheating by looking stuff up): 1. Blackbody radiation per unit wavelength. 2. Momentum. 3. Not sure. Quantum harmonic oscillator? Orbital mechanics? 4. Pythagorean theorem. 5. Bernoulli's equation. 6. Drake equation. 7. Velocity. 8. Ballistic/projectile motion. 9. Blackbody radiation per unit frequency. 10. Newton's law of gravity. 11. One of the Freidman equations for cosmological expansion. 12. Velocity of an accelerating object over some distance. 13. Einstein's mass-energy equivalence. (The memorable half, at least.) 14. Newton's second law. 15. Not sure, but I have a feeling that's one of the terms of the Ricci curvature. Maybe the classical limit? 15E. Edit: Whoops, nope, it's the Rydberg constant from the Rydberg formula for atomic energy levels. (Thanks gus_massa!) 16. Not sure. Reminds me of population inversion, so I'd guess stable state population of some quantum transition. 17. Not a clue. [1][9] https://physics.stackexchange.com/questions/505909/frequency-and-wavelength-of-thermal-radiation https://physics.stackexchange.com/questions/505909/frequency... [11] https://en.wikipedia.org/wiki/Friedmann_equations https://en.wikipedia.org/wiki/Friedmann_equations [13] https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relation https://en.wikipedia.org/wiki/Energy%E2%80%93momentum_relati... [15] https://en.wikipedia.org/wiki/Ricci_curvature https://en.wikipedia.org/wiki/Ricci_curvature [15E] https://en.wikipedia.org/wiki/Rydberg_formula https://en.wikipedia.org/wiki/Rydberg_formula [16] https://en.wikipedia.org/wiki/Population_inversion https://en.wikipedia.org/wiki/Population_inversion