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Showing content with the highest reputation on 09/09/20 in all areas

  1. 2 points
    To rhyme with rubles I presume... There's a reason why rubble has a double B. It's absurd; they are all bad attempts to reinvent this wheel;. ˈtrʌb(ə)l On the other hand, I gather that spelling contests are only national TV in anglophone countries... It's quite entertaining to get anyone- particularly a well educated native English speaker- to read this out loud. "I take it you already know Of tough and bough and cough and dough Others may stumble, but not you On hiccough, thorough, laugh, and through. And cork and work and card and ward And font and front and word and sword Well done! And now you wish, perhaps To learn of less familiar traps, Beware of heard, a dreadful word That looks like beard and sounds like bird. And dead: it’s said like bed, not bead– For goodness sakes don’t call it deed. Watch out for meat and great and threat, They rhyme with suite and straight and debt. A moth is not a moth in mother, Nor both in bother, broth in brother. And here is not a match for there, And dear and fear for bear and pear. And then there’s dose and rose and lose– Just look them up–and goose and choose, And do and go, then thwart and cart. Come, come, I’ve hardly made a start! A dreadful language? Man alive! I’d mastered it when I was five." We also have route pronounced the way Americans pronounce route and the two bits of equipment, a router and a router with different pronunciations. It depends if it's a modem like thingy where it's pronounced like roux; or a woodworking tool where it's pronounced like row.
  2. 1 point
    https://scitechdaily.com/black-hole-plasma-conditions-created-on-earth-laser-briefly-uses-1000-times-the-electric-consumption-of-the-entire-globe/
  3. 1 point
    But isn’t it less dangerous inherently in smaller cities, where there is less traffic?
  4. 1 point
    Sorry for not being very clear Zap. Relativity doesn't just refer to Einstein's theories; the majority of our measurements are relative to something else. For example, the speed of a ball I throw at you is measured with respect to me and you; based on that you can calculate the kinetic energy, and the force with which it will hit you. But if you measure the speed of the ball with respect to the Earth' orbit about the Sun, it may be moving backwards. Or if measured with respect to geordief's absolute frame at the centre of the universe, it may be moving close to the SoL, making calculations of the type mentioned non-sensical. Don't get me wrong, there are things that are absolute, but we do have ways to deal with it. In physics we distinguish measurements made on an absolute frame or scale. Think of the temperature scale. When we measure relative to something else on the same scale, we call it 'gauge'.. Think of your body being at 100V potential, touching a live wire, and feeling only a 20V shock.
  5. 1 point
  6. 1 point
    An example might be an inertial frame vs. a rotating frame. We know that an inertial frame is "preferred" (though there is no particular one that is) and you can tell whether or not you are in that frame because F=ma works in an inertial frame, but you need to add a fictitious centrifugal force to that equation in a rotating frame. IOW, F=ma no longer works If you lose the invariance of c — the speed of light only has that value in one particular frame — special relativity no longer works. These problems ripple through physics. In the case of a non-invariant c, Maxwells equations fail, too. One can't assume one impossible thing but assume everything else works just fine. Physics got a whole lot simpler when we realized we weren't at the center, though. We didn't need epicycles that had no physical basis. You could make the math work (it's Fourier analysis), but the physics was different. And that's the change in our understanding. (F=ma and gravity) vs something that was not
  7. 1 point
    A 'preferred frame' implies that you can hang a co-ordinate system onto an event, and that origin point is at rest with respect to everything else in the universe. That is what the fictitious centralized Big Bang scenario does. Essentially, it breaks relativity. ( and not just Einsteinian relativity, but all the way back to Galileo's time and earlier )
  8. 1 point
    ! Moderator Note It's great that you want to ask question, but what's not so great is that you continue to hijack threads to ask them. If you have a direction not directed to the OP, or about the topic, you need to start a new thread. You need to identify what would allow you to identify the preferred frame, and that will identify the part of physics you've broken that would give you a preferred frame. The thing is, you can't really describe that with accepted physics, since accepted physics doesn't have a preferred frame. Also, what does " any invariance in c" mean? It's either invariant or it isn't. "Some invariance" is like being a little pregnant.
  9. 1 point
    Imagine that... 😉 It feels similar to the army of the righteously indignant, a legitimate feeling of being able to change what they find abhorrent, with little thought of the consequences. If we want to persuade them to change their intuitive understanding of our world; we, as a society have to stop trying to scare them into agreeing to a status quo, that only offers reduced privilege's. We are capable of critically thinking past the fear and TBH I'm not sure who should be taking the piss out of whom. 😵 Ditto with Trump and his ilk... Religion also offers heaven and a path to find it; But Hitler hates you.
  10. 1 point
    Calculation shortcuts and mnemonics.
  11. 1 point
    These are not palindromes but still useless but interesting 122 = 144 reverse the digits 212 = 441 and 132 = 169 reverse the digits 312 = 961
  12. 1 point
    "We have two lives, the second begins when we realize we only have one." - Confucius.
  13. 1 point
    Who are 'they'? How many of 'them' are there? Where are 'they' and what do 'they' want? Can I be one of 'them'? Who chose 'them'? Who chose those who chose 'them'? Do 'they' speak to you? Do 'they' speak to each other? So many questions... Let's not. Let's be reasonable and understand how things happen.
  14. 1 point
    Hey! I think you can check well in factors that affect chemical equilibrium.. or what we call La chatelier's principle Any gaseous reaction may result in increase/decrease of pressure based on the conditions....Eg: N2+H2----»NH3 in gaseous state. When you increase pressure the more ammonia will be given(Pressure reduction on the forward side) When you reduce pressure, the few ammonia will be given(Pressure increase on the forward side)
  15. 1 point
    Its a social construct, thus the question of whether there is any in war boils down to what the culture of the considered side is like, or both in some cases. But generally i doubt its something that manifests in all societies. On the other hand there may be analogous of glory in other cultures that are just very similiar to the western concept. Maybe you could be more specific, things are just very open ended otherwise.
  16. 1 point
    One of my favs which hasn't been mentioned is Isaac Arthur.
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