gasdive

gasdive

  • Commented on Catching Up
    Amusingly... (what, more evidence is amusing) Well in this case. I googled for books containing the exact phrase "an orbit followed by electrons around an atom's nucleus" I got 205 books. Text books that someone pays through the nose to...
  • Commented on Catching Up
    "Valence shells are not orbits." Glad to hear that... https://books.google.com.au/books?id=TkX-Vdm0JhIC&pg=PT113&lpg=PT113&dq=%22an+orbit+followed+by+electrons+around+an+atom%27s+nucleus%22&source=bl&ots=_cUEDvvKjJ&sig=roFrKrEIiMenaxJt1-hD2Tc4pn4&hl=en&sa=X&redir_esc=y#v=onepage&q=%22an%20orbit%20followed%20by%20electrons%20around%20an%20atom%27s%20nucleus%22&f=false...
  • Commented on Catching Up
    Happy to do so the moment you point to where I've ever (I mean *ever* not just in this thread, feel free to google) said a 3 body problem solved to a perfect ellipse in every case. The continued irony...
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    Yep. What you're saying is a practical application of bayesian reasoning. Something sadly well beyond most police officers and almost all the population. Say 90% of drug crime prisoners have tattoos. On that basis failing to stop and search everyone...
  • Commented on Catching Up
    My head hurts too much to try to extract meaning from what EC said, and you're commentary didn't really help. You seem to be both saying that it's vital we use the simplest description of reality (correct or not) on...
  • Commented on Catching Up
    Lot of interesting points, and I don't have the energy to answer them all (I'm currently in the happy fun times of a splitting migraine) "Thank you for the transcription" No worries, it's something that deserves to be shared and...
  • Commented on Catching Up
    And Paws... "less than 10 km area, then you can approximate a "flat" Earth & a uniform G-field...Naval Gunnery had to allow for curvature of course" So you're prepared to admit that in special cases, perhaps Newton got things right?...
  • Commented on Catching Up
    I certainly do need to study the topic a lot more intensively if I'm to make any sense of what you said. You say:"a parabola ... is a very good practical approximation...an ellipse ... isn't even as practical an approximation...
  • Commented on Catching Up
    The irony of saying "It's a parabola in a uniform gravitational field, which is a very good practical approximation" on the blog of the author of "Missile Gap" is not lost on me......
  • Commented on Catching Up
    Now I have to clean my screen. I shouldn't read this while eating dinner. I think I can rest my case that science education is an abject fail. (and by extension, all the rest). Reasonably intelligent people, from a wide...
  • Commented on Catching Up
    Cannon not Canon. No tests with Japanese cameras of any sort....
  • Commented on Catching Up
    "Newtonian model has limits... Would its path still be a parabola?" I asked would its path still be an Elephant but you ignored it. It's not a parabola (or an Elephant). You and others here claim that Newtonian physics of...
  • Commented on Catching Up
    Actually, I have to add to that... That video, of someone you claim to aspire to emulate... It was *so* bad. *so* campy. *so* wrong, and yet so filled with little hints like the bit about objects falling at the...
  • Commented on Catching Up
    "if you vehemently disagree with it you need to argue with Mitzie Hunter, not me" At the risk of reaching Godwin, you're seriously going to claim that you jumped into this discussion, telling us what a great thing it is...
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    "will some shiny lad have had them away down the markets?" All your other points are good ones, but this one may have a solution. If you put them in boxes that trigger the fire alarm when opened (which you...
  • Commented on Catching Up
    "By the same logic, the word "circles" does not exist." Semantics. Just because another word is used incorrectly elsewhere doesn't mean that it's being used correctly here. Correctly one would say "I drew 6 circular lines" not "I drew 6...
  • Commented on Catching Up
    Para 2 There's no plural of parabola. There's only one shape that's a parabola. I guess you could think about an object following a parabola, but it wouldn't really occur in nature. You're better off to think of objects following...
  • Commented on Catching Up
    I was just going to make flippant and insulting remarks. Then I decided not to do that as talking to teachers like normal adults who are saying something completely stupid always makes them cross and it never helps. (I discovered...
  • Commented on Catching Up
    "Would its path still be a parabola?" How about, "is it a lie if you don't even know you're lying?" Would its path still be an elephant?...
  • Commented on Catching Up
    "Para 2 - To which the correct answer is, of course, "insufficient data."" Only if your understanding has been scrambled by the strange descriptions they give in school, where an orbital path is somehow a different class of thing to...
  • Commented on Catching Up
    Actually, OGH's comment '75' in the latest thread re normalisation of weird shit, is probably a good hint as to why they won't give it up. Yes, learning is clearly damaged by teaching garbage, yes it destroys kids desire to...
  • Commented on Catching Up
    Bohr's atom isn't even a model. No-one (except decades of physics teachers) ever thought that it could be right. Electrons in orbit? They're an accelerating charge for fuck sake and they'll emit photons. Bohr didn't think it was right. *NO_ONE*...
  • Commented on Catching Up
    "but don't flat out tell me it's wrong" Sorry, but that's how the world works. https://www.youtube.com/watch?v=LIxvQMhttq4...
  • Commented on Catching Up
    Ok, then, a simple test to see if you've taught your students to understand or if you've taught them to pass exams with a load of useless and wrong information, that exists as discrete chunks of misshapen and unconectible jigsaw...
  • Commented on Catching Up
    You could be right. y = ax^2 + bx + c is safe for young minds, but y = b/a sqrt(a^2-x^2) will surely bring eldritch horrors from another dimension to eat their young minds. No, it was most certainly ***NOT***...
  • Commented on Catching Up
    "or the world's flat" You mean the world isn't flat? I was taught in school (by the same people who handed out potassium dicromate to children), that the path of a thrown object is given by y=-x^2. Which of course...
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    Yep, absolutely. Even if they're a bit crap, they're still so much better than anything else that one might have to hand. I have no idea why they're not deployed exactly as you suggest....
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    Actually that's an exaggeration. The Biopak 240 is only US$13000...
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    Yes. Not just confusing them, I had no idea these things existed. The only on land gear I knew about was either mine self rescue gear They're tiny gadgets you carry on your belt to get you out, but an...
  • Commented on Crying fire in a crowded theatre for pleasure and profit
    I actually thought I'd maxed out the bitter hatred I had for school and the dickheads who where my "teachers" Now I find that they may actually end my life early or cause some sort of heritable shit to happen...
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