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Strange

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Everything posted by Strange

  1. I don't think common usage distinguishes "less" and "fewer". But you are right, that might be changing.
  2. It has always been true. Sadly, a few pedants have recently discovered this zombie rule and think it’s clever to pick on people
  3. Located where simultaneously? And simultaneous according to who? At 0 in which frame of reference? What is "left"? Is it the same as A or green, or is it something else completely? What is an "axis of simultaneity"? Only if they are both stationary relative to one another. (Not sure what you had to make things so complicated by using A and black, and B and green (and left and right?) to refer to the same things.) What is 'f'? Why isn't the length of his ship d in his frame of reference? What is 'e' ? What is 'g'? You are saying that g2 = f /e ? (Or maybe g2 = f /e? I am confused by your constantly changing names for things) How did you calculate this? What does this mean? (It sounds wrong, but unless you explain it, it is hard to know.) I'll ignore the rest, because without some explanation, I have no idea what you are trying to say. However, almost every statement appears to be incorrect.
  4. You need to provide that much energy to create the plasma. It is not a source of energy.
  5. Strange

    Today I Learned

    Today I learned about Vavilovian mimicry. Nikolai Ivanovich Vavilov was a biologist who studied the evolution of domesticated plants, in particular rye. He proposed that rye was "accidentally" domesticated. Originally it was a weed in fields of wheat and so early farmer would pick it out to ensure their wheat could grow. But they were more efficient at picking out the immature rye plants that looked most different from wheat. So they inadvertently selected for rye plants that looked more wheat-like. Eventually rye became so similar to wheat that it was a useful grain in its own right. This is generally accepted today, even though Vavilov is largely forgotten. Vavilov was killed by Stalin, who only liked science that fitted his political beliefs (e.g. Lysenkoism).
  6. ! Moderator Note I'm guessing that it was closed for being full of baseless claims, handwavey explanations and a total lack of any calculations. Shall I start the countdown for this one now ...
  7. Here: https://en.wikipedia.org/wiki/Vitamin_B12#Industrial And: https://en.wikipedia.org/wiki/Pseudomonas_denitrificans https://en.wikipedia.org/wiki/Propionibacterium_freudenreichii So no harvesting from animals there. Show this to your friend: https://xkcd.com/285/ The ball is in their court to provide some evidence.
  8. You can think of complex numbers as points on a plane where the real numbers form the X axis and the “imaginary” numbers (multiplied by i) form the Y axis. Values multiplied by sqrt(i) would form a line at 45º. To put it another way, multiplying by i is equivalent to rotating by 90º and rotating by sqrt(i) is equivalent to rotating by 45º. Note that rotating by 45º and then by 45º (i.e. rotating by 90º) is equivalent to multiplying by sqrt(i) then by sqrt(i) again; in other words multiplying by i (i.e. rotating by 90º). (Because they can encode angles and magnitude in one (complex) number, they are very useful in things like signal processing and circuit design)
  9. ! Moderator Note This is a discussion form. What do you want to discuss?
  10. Nothing at all wrong with "least" in this context.
  11. Because they are bound together by gravity. Galaxies are similarly held together by gravity, And even clusters of galaxies. It is only on very large scales (the distances between clusters of galaxies) that we can see expansion happening.
  12. These are not "papers" in any meaningful sense. Explain how those forces can have multiple different values at the same time. And, at the other extreme, we know (from observation) that protons are flatted by their relative motion in an accelerator but EM forces do not play a significant role. In other words: wrongly.
  13. So maybe "walk" and "walks" are one word. But does that mean that "ox" and "oxen" are two? 🙂 Misspelling for "Witch language", maybe
  14. Brownian motion is what the random vibrations of the molecules impart to larger particles!
  15. Good luck with that. Baseless beliefs rarely work as medical treatments. It was more the "Dying as a result is not going to be a result" that was being challenged. It is extremely contagious and has a high case fatality rate. Quite the reverse of "puny". Ask the USA or Brazil how "puny" it is.
  16. Not just that. Most people would describe the random motions of water molecules as vibration (see citation above). Maybe that is a broader definition of the word than some would like, but it is clearly the one the OP was thinking of.
  17. https://www.britannica.com/science/Brownian-motion And I always thought the Encyclopaedia Brittanica was such a reliable source of information. But apparently, I should take the word of some RGOTI instead. (About 1/3rd of the search results for Brownian motion also include the word vibration)
  18. Obviously, it isn't in your narrow definition. "No true Scotsman ..."
  19. Better tell all these people, then. https://phys.org/news/2014-05-molecular-vibrations-hydrogen.html https://www.sciencedaily.com/releases/2014/05/140501142227.htm http://www.schoolphysics.co.uk/age16-19/Wave properties/Wave properties/text/Microwave_ovens/index.html https://www.azonano.com/news.aspx?newsID=36282 http://www.wiredchemist.com/chemistry/instructional/supplemental-material-for-chemistry/chapter-7/animations That last one also describes the most obvious form of vibration, which is also temperature dependent and so, presumably, what the OP was thinking of: Now, try saying that those are not "vibration" at the same time as saying that your definition is "not narrow".
  20. I'm sure it is just coincidence, but Japanese uses "ka" for the same purpose: I eat = taberu Do I eat? = taberu ka? Japanese also (nearly always) drops pronouns even though they are not implied. 🙀 I eat = taberu You eat = taberu She eats = taberu They eat = taberu We eat = taberu So that could mean that Japanese has fewer words. But I ate = tabeta I don't eat = tabenai I want to eat = tabetai I don't want to eat = tabetakunai I didn't want to eat = tabetekunakkata I can eat = taberareru Let's eat = tabeyou etc. etc. So maybe it has more words.
  21. You must have a very narrow definition of "vibrate".
  22. That can't possibly be the case. How can there be a change in EM force caused by an observer? How can there be a different change in my body depending on whether my speed is compared to a meteorite or a neutrino.
  23. Conduction will take place as well. But, in a liquid, heat transfer by convection will be much faster.
  24. So it IS a possible result of catching the virus. It could kill you (despite your delusional belief in your immunity) and it could kill someone you pass it on to.
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