Doing physics means calculating a number Updated 2025-07-16
It does not matter how, if it is exact, or numerical, or a message from God: a number has to come out of the formulas in the end, and you have to compare it with the experimental data.
Many theoretical physicists seem to forget this in their lectures, see also: Section "How to teach and learn physics".
Wei Dai Updated 2025-07-16
Spectral line Updated 2025-07-16
A single line in the emission spectrum.
Has been the leading motivation of the development of quantum mechanics, all the way from the:
- Schrödinger equation: major lines predicted, including Zeeman effect, but not finer line splits like fine structure
- Dirac equation: explains fine structure 2p spin split due to electron spin/orbit interactions, but not Lamb shift
- quantum electrodynamics: explains Lamb shift
- hyperfine structure: due to electron/nucleus spin interactions, offers a window into nuclear spin
Reaction rate Updated 2025-07-16
Rotrics Updated 2025-07-16
Shimano Updated 2025-07-16
Manuals: si.shimano.com/
Total synthesis Updated 2025-07-16
United States Department of Energy Updated 2025-07-16
Alfred Nobel Updated 2025-07-16
Apparent magnitude Updated 2025-07-16
Ciro Santilli's parents Updated 2025-07-16
Disqus Updated 2025-07-16
Entropy of a chemical reaction Updated 2025-07-16
First, experiments, please how do you determine it and how it helps predict the future: chemistry.stackexchange.com/questions/42066/is-there-a-way-to-experimentally-measure-entropy
George M. Church Updated 2025-07-16
History of the atomic theory Updated 2025-07-16
In which roads is it OK to ride your bike based on car speed limits Updated 2025-07-16
Jacques Monod Updated 2025-07-16
Model of the atom Updated 2025-07-16
Parenteral nutrition Updated 2025-07-16
For some reason, this is one of the things that makes Ciro Santilli want to puke the most. More than surgery or blood.
Planet Updated 2025-07-16
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