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Anyone recognize all the equations? I only recognize a few specifically and can sort of guess the general area of some of the rest. From left to right then top
by tzs 2y ago
Anyone recognize all the equations? I only recognize a few specifically and can sort of guess the general area of some of the rest.
From left to right then top to bottom:
1. No idea. Based on the E sub λ, the use of Planck's and Boltzmann's constants, and the e^(hc/λkt)-1 I'd guess its the energy of something at wavelength λ and temperature t. I don't recall ever seeing energy have a factor of 1/λ^5 before college was over 40 years ago so I might have forgotten.
2. Momentum change required to change the speed of a mass by Δv?
3. No idea on the one for dt/dλ. Nothing from the left appears explicitly on the right.
On to the second row.
4. Pythagorean theorem.
5. No idea.
Next row
6. The Drake equation.
7. Definition of average velocity.
Next row.
8. Position of free falling object in a 1 g uniform gravitational field in a vacuum.
Next row.
9. Something thermodynamic.
10. Newton's law of gravity.
11. Looks like half of this is blocked by her head, but given that it is next to Newton's law of gravity, and has 8 Pi G in it which also appears in general relativity a lot, and that it has on the right side the ratio of jerk to acceleration (assuming a is acceleration), I'm going to guess something to do with relativistic gravity.
Next row.
12. No idea.
13. The most famous equation in the world.
14. Newton's second law.
15. Too much is cut off.
Final row.
16. Seems to be calculating the ratio of successive terms of some sequence. Partly cut off but can see Planck and Boltzmann constants so guessing we are back at thermodynamics. I'll go out on a limb and guess it has something do with entropy.
16. Too much is cut off.
- gus_massa 2y ago[No cheating looking at Wikipedia] 3. Laplacian in spherical coordinates??? 5. Conservation of energy in fluids. Preasure P + Kinetic 1/2 ρ v^2 + Potential ρ g h = ... 9. Probably something about a blackbody radiation like 1. 11. I agree it's related to gravity, but I'm not sure. 12. Velocity of an object a when there is constant aceleration "a" (for example with a constant force like friction) after it moved a distance Δx 15. Energy of photons when an electron changes the orbit in Hidrogen. (Is it the Bohr equation?) 16. No idea, or actualy too many ideas that make no sense. 17. Also, no idea, or actualy too many ideas that make no sense (it has G, T and h ¿¿¿Hawking radiation???)
- itishappy 2y agoFun! 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
- js2 2y agoI pasted the photo into ChatGPT. Here's what it came up with. The whiteboard contains several famous physics equations. Here are the ones I can identify: 1. *Einstein's field equations (General Relativity):* \[ E = \frac{8\pi G}{3} \left( \rho + \frac{\Lambda}{8\pi G} \right) \] \[ R_{\mu\nu} - \frac{1}{2} R g_{\mu\nu} + \Lambda g_{\mu\nu} = \frac{8 \pi G}{c^4} T_{\mu\nu} \] 2. *Planck's law:* \[ E = h\nu \] \[ E = \frac{hc}{\lambda} \] 3. *Schrödinger equation (Quantum Mechanics):* \[ i\hbar \frac{\partial \psi}{\partial t} = \hat{H} \psi \] 4. *Lagrangian mechanics:* \[ L = T - V \] where \( T \) is kinetic energy and \( V \) is potential energy. 5. *Newton's law of universal gravitation:* \[ F = G\frac{m_1 m_2}{r^2} \] 6. *Friedmann equations (Cosmology):* \[ \left(\frac{\dot{a}}{a}\right)^2 = \frac{8\pi G}{3} \rho - \frac{k}{a^2} \] 7. *Coulomb's law:* \[ F = k_e \frac{q_1 q_2}{r^2} \] 8. *Boltzmann's entropy formula:* \[ S = k_B \ln \Omega \] 9. *Maxwell's equations (Electromagnetism):* \[ \nabla \cdot \mathbf{E} = \frac{\rho}{\epsilon_0} \] \[ \nabla \times \mathbf{B} - \mu_0 \epsilon_0 \frac{\partial \mathbf{E}}{\partial t} = \mu_0 \mathbf{J} \] 10. *The cosmological equation:* \[ \ddot{a} = -\frac{4 \pi G}{3} (\rho + 3p) a + \frac{\Lambda}{3} a \] 11. *Thermodynamic identity:* \[ dU = TdS - PdV \] This collection of equations spans various domains of physics, including quantum mechanics, general relativity, electromagnetism, thermodynamics, and cosmology.
- gus_massa 2y agoIt's interesting and amazing that most of those results by ChapGPT are completely wrong. The only ones that got right are 5 and 6 that are 10 and 11 in the GP numbering. 5->10 was an easy one. 6->11 was one of the equations we coudn't identify, but ChatGPT got correctly https://en.wikipedia.org/wiki/Friedmann_equations https://en.wikipedia.org/wiki/Friedmann_equations