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  1. rumborak

    B Calculate, not measure the value of c

    I am taking your question to mean, "can c be derived from first principles, purely on paper, not relying on measured quantities?", in which case the answer is no. It is considered a fundamental physical constant that is established empirically.
  2. rumborak

    B Shadow of clouds over the Sea

    I think you misunderstood my point. I wasn't saying that the emitted light has some kind of directionality to it (I agree with you, it doesn't), but instead that if you section the "sun disk" into vertical slices, the slices towards the edge of the sun are shorter and thus contribute less to the...
  3. rumborak

    B Shadow of clouds over the Sea

    Keep in mind that the sun is a sphere, so you are getting almost no light from the left edge of it or the right. You can probably halve your estimate to 8m because of that.
  4. rumborak

    B Warm air goes up...reason on a microscopic scale?

    What you are describing is heat conduction. However, air actually being a pretty good insulator, it could not account for the often drastic and fast changes. Nah, hot air rising is likely to be due to convection instead. Even in the atmosphere, that's how wind comes about after all.
  5. rumborak

    B Warm air goes up...reason on a microscopic scale?

    Drakkith, I think your intuition about the pressure differential is right. In zero gravity hot air doesn't "move", it only slowly equalizes in temperature. I suspect the higher average kinetic energy gives the "hot" molecules more opportunity to escape both up and down, whereas the "cold...
  6. rumborak

    I Self balancing stick based on flywheels

    Your question comes down to, can you indefinitely accelerate a motor? I think the answer is kinda obvious.
  7. rumborak

    I Self balancing stick based on flywheels

    Given how the motor has a limited amount of torque it can exert through acceleration, I would think it's rather obvious that there will be an amount of impact above which the motor can not counteract.
  8. rumborak

    I 1s orbital overlaps with the nucleus, why don't they interact?

    I would think the previous discussion in this thread indicates that I was indeed talking about interaction between the electron's wave function and the proton's, not just a chemistry consideration. I was wondering why, if the the highest probability of an 1s electron is smack in the middle of...
  9. rumborak

    I 1s orbital overlaps with the nucleus, why don't they interact?

    Granted, the size difference between a hydrogen atom's electron cloud and its nucleus is a factor of one million (~1Å vs ~10^-6Å), but that's still a significant amount of overlap that, I would think, would trigger the occasional interaction.
  10. rumborak

    B Brainstorm: Is absolute zero relative

    As a general comment, lack of use is not a particularly good indicator of usefulness. I don't think anyone disputes the usefulness of the metric system, despite its lack of use in the US.
  11. rumborak

    B Brainstorm: Is absolute zero relative

    I have often wondered whether a logarithmic temperature scale wouldn't be more sensible, sorta like decibel. Then again that would require a "reference temperature", and that would be arbitrary.
  12. rumborak

    I Homebrewing a spectrometer

    I had some time to 3D print a prototype of my low-end spectrometer: https://imgur.com/gallery/IHWOe It's not working that well yet, I already have a V2. It's mostly fun, I can already tell the quality of output is nowhere near of what would be actually useful.
  13. rumborak

    I Homebrewing a spectrometer

    Strangely enough, I just earlier today bought a diffraction grating for the exact same purpose. My plan is slightly different, I want to 3D-print a small adapter you can put on a smartphone camera.
  14. rumborak

    I Gravity as geometry vs gravity traveling at c

    I may be mistaken, but I thought the graviton point of view does away with space-time distortion.
  15. rumborak

    I Gravity as geometry vs gravity traveling at c

    A follow-up question: how come for gravity the space-time distortion view is preferred (to my understanding, a hypothetical graviton field would be equivalent), whereas the other forces are preferred to be viewed as fields?
  16. rumborak

    B Is energy just change that is quantified

    For the most part, physics is about learning what some really smart people have figured out before you. One of the worst, yet common, mistakes by people is to assume that their armchair musings are the first time somebody ever thought about the subject. Regarding the OP subject, I have thought...
  17. rumborak

    B Gravity's Opposite Reaction

    Action/reaction is only relevant when considering forces. When you switch to the spacetime curvatures view of it, it no longer applies.
  18. rumborak

    B Gravity's Opposite Reaction

    You're entirely overthinking this. For the purposes of force analysis (i.e. action and reaction), just stick with the regular gravitational force. No spacetime curvatures necessary.
  19. rumborak

    B Gravity's Opposite Reaction

    There are two forces: the one tugging on asteroid 1 towards asteroid 2, and the exact equal but opposite-direction force that tugs asteroid 2 towards asteroid 1. That's all there is to it.
  20. rumborak

    I Why Is There No SI Unit For Information?

    One of the keystones of Shannon's theory is the distinction between the information content itself, and its representation. Even though you might be sending a signal as a sequence of 0s and 1s, that does not mean each digit's information content is also 1 bit. As an extreme example, consider a...
  21. rumborak

    B Einstein's Unified Field Theory - Details

    Um, have you googled "einstein unified field theory"? A ton of websites go into detail.
  22. rumborak

    B Claude Dechales anti-Copernican arguments question

    Not sure what part you think wouldn't be true. As sophiecentaur says, the Coriolis effect obviously is real and happening; it can be observed every day in numerous things. Maybe you're confused what the article is saying. All the article shows is that there was an individual who predicted the...
  23. rumborak

    B Claude Dechales anti-Copernican arguments question

    His arguments are sound, but his conclusion rests on the statement that the effect has not been observed. Who knows what he tried, or what his expectations of the magnitude were. It isn't the most easily demonstrated effect, and Foucaults Pendulum came about much later.
  24. rumborak

    B Gravity and the Direction of Time

    I do not in the slightest claim to understand the paper itself, but this section may elucidate why it didn't have bigger repercussions: "We emphasize that in this Letter we make no claim to explain all the various arrows of time. We are making just one point: an arrow of time does arise in at...
  25. rumborak

    B Irreversible machines

    I can't quite tell whether you drew the correct conclusion or not, but the bottom line of all of this is: - Energy is conserved at all times - All real machines incur irreversible losses
  26. rumborak

    B Irreversible machines

    Well, the inability of returning it to the original state without friction losses is the very point of Feynman; it is the difference between a real machine (irreversible) and an idealized one (reversible). In this universe, you can only build real machines.
  27. rumborak

    B Irreversible machines

    I think with that last statement you switched back from irreversible to reversible machine.
  28. rumborak

    B Meaning of the constant c

    If I understand the OP post correctly, he is trying to use the string derivation of the wave equation to glean insight into the "cause" of c, i.e. apply that insight into space-time. I don't think you can. I think you just have to take the 1/c^2 as a factor that, while eventually causing the...
  29. rumborak

    I Energy perspective on deterministic intelligence

    As a side note, I also *hate* the statement "computers can't do emotions". As a big Star Trek fan, it drove me nuts whenever they used that as a plot line. Emotions are actually pretty damn simple to emulate.
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