What are the most important open questions in classical physics?

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Discussion Overview

The discussion revolves around identifying significant open questions and current trends in classical physics, with a focus on various topics of interest within the field. Participants express curiosity about complex systems, the buttered toast phenomenon, and turbulence, among other areas.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant seeks insights from those working in classical physics about the most important or interesting research trends.
  • Another participant expresses interest in complex systems, though they do not work in physics.
  • Multiple participants raise the question of why toast tends to fall jelly side down, referencing previous work that suggests this might be a universal constant influenced by gravitational fields and the body's response to them.
  • A participant mentions turbulence and the ergodic hypothesis as areas of interest in classical physics.

Areas of Agreement / Disagreement

Participants express a variety of interests and questions, but there is no consensus on specific open questions or trends in classical physics. The discussion remains unresolved with multiple competing views and topics.

Contextual Notes

The discussion includes speculative ideas about the buttered toast phenomenon and its implications, as well as references to academic work that may not be universally accepted or conclusive.

andresB
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As the tittle say. I've been out of touch with many branch of non-quantum non-relativistic physics and I would like to know what people that work in these areas would say are the most important or interesting current trents of research in classical physics.
 
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Though I myself do not work in physics area I find complex systems interesting.
 
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Why does the toast always fall jelly side down?
 
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HallsofIvy said:
Why does the toast always fall jelly side down?
I thought somebody had done some work on that. The conclusion, as I recall, was that in a higher gravitational field we'd be shorter (due to needing to pump blood to our heads) by exactly the same fraction as the increase in the gravitational couple and hence spin rate imparted to dropped toast. So they proposed that toast falling butter side down was likely a universal constant.
 
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HallsofIvy said:
Why does the toast always fall jelly side down?
Ibix said:
I thought somebody had done some work on that. The conclusion, as I recall, was that in a higher gravitational field we'd be shorter (due to needing to pump blood to our heads) by exactly the same fraction as the increase in the gravitational couple and hence spin rate imparted to dropped toast. So they proposed that toast falling butter side down was likely a universal constant.

Pleasantly surprised to find https://en.wikipedia.org/wiki/Buttered_toast_phenomenon.
Among the references:

Bacon (2001). "A closer look at tumbling toast". American Journal of Physics. 69: 38–43.
https://doi.org/10.1119/1.1289213
https://space.umd.edu/dch/p405s04/AJP00038.pdf

R A J Matthews (1995) "Tumbling toast, Murphy's Law and the fundamental constants". Eur. J. Phys. 16 172
https://doi.org/10.1088/0143-0807/16/4/005
 
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Turbulence is always interesting. Probably ergodic hypothesis too.
 
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