Search results

  1. J

    The owie stick

    You don't need high explosives, and most the time you wouldn't even need explosives at all, what are you shooting at? A car, a plane, a tank? In two cases your better of with a simple projectile and in the last you wouldn't be able to form a proper current conducting line anyway, and the em...
  2. J

    The owie stick

    Telling people to think outside the box is low grade marketing hogwash. Emp pulses? That's great if you are engaging in mech warfare, and as stated that would be a great idea for a scifi explanation of a weapon. But it's not really a great fit for the real world. Again, whatever you are...
  3. J

    The owie stick

    Why bother? It only works if your original bullet hits the target in which case you don't need the lightning. Though it works great as an offhand explanation for directed lightning guns in scifi literature.
  4. J

    Why do positive and negative charges attract?

    There is a lot of talk in this thread about the nature of your question and whether you should be asking it at all, I think this is unnecessary noise in the discussion. Why do likes charges attract? Well, lets ask first a more useful question, what is charge? Well charge is a concept we have...
  5. J

    Has anyone ever programmed a computer system to evolve theories?

    You are proving my point exactly, you have offered no objective definition of intelligence, but seem completely confident that what ever definition is the "correct" one, it will exclude computers because you consider them to be dumb. Therefore you are fully accepting that we revise our...
  6. J

    Why convection happens when concentration gradients exist?

    Consider a closed container which we mentally divide into two equally shaped and sized sections, denoted the left and right sections. If at zero time there are a million particles in the left side, and no particles in the right, and all these particles are bouncing around randomly, how many...
  7. J

    Has anyone ever programmed a computer system to evolve theories?

    The definition of smart/intelligent has evolved during the rise of computers to mean exactly that which a computer is not, and if this continues computers will never be intelligent. This does not mean that they cannot solve any particular class of problems better then humans, it just means that...
  8. J

    Why wouldn't this work?

    If you make the same drawing, but replace the magnet and the metal plate with a rubber band stretched between the two points, you have physically the same situation. You could argue using newtons third law, which states that every action has an opposite reaction of the same magnitude. The...
  9. J

    There is no such thing as 'collapse of the wavefunction' - Feynman

    The collapse of the wave function is real, Just like the collapse of the probability in a coin toss experiment is real. People just get confused about what it means, and start talking about it like it's some magical operation. Consider the coin toss. At one instance the probability of getting...
  10. J

    What happens if we use two lasers for interference?

    You can calculate this just using regular electromagnetism, and I belive you would see some interference provided that each laser has a long coherence length, and that the phase difference between them is stable for long times. If the reason for your question is something in the lines of "Do...
  11. J

    Cantors diagonals Listable vs. countable

    Well as they refere to a list in my textbook, they refere to "imaginary" listings like on a blackboard, and while this implies a ordering, it also requires both a first element and a last element, which the natural numbers have not. But thank you HallsofIvy for the answer, I understand now...
  12. J

    Cantors diagonals Listable vs. countable

    So i'm familier with cantos diagonals, but fail to see how something being unlistable makes it uncountable. Now a set being countable is to say it has a one to one corrospondance to the natural numbers, but using the diagonal method one can prove that the natural numbers are themselves...
  13. J

    Why Couldn't Einstein Accept Non-Locality?

    Personally I belive he just like many after him never saw the clear need to jump to nonlocality to explain what could (and can still!) be explained by more moderate means. If i showed you a box and said it contained a million dollars, but that they would disapear if you opened it, would you...
  14. J

    Need Understandable Explanation Of Bell's Theorum

    Year, thx for the post, however I'm not quite sure how this experiment rules out a hiddenvariable model. I'm a little stumped with what they define as a "classical" model. Why is it that the classical model _must_ be a product of four different functions of the different angles? And why is it...
  15. J

    Need Understandable Explanation Of Bell's Theorum

    Not being an expert in the field I can't say with 100% certainty that this is true, but it seems to me that the "successes" of quantum mechanics relates to it giving the correct predictions in experiments, not with the "nature" of the theory. Now even in entanglement experiments, it seems that...
  16. J

    A bird and a train

    This is not that important, but first: Birds that cruise travel at a negative velocity with respect to the train (since they are not flapping they are slowly slowing down), at the same time, they are only staying in the air, due to the friction of the wind, so if it travels at the same speed as...
  17. J

    Why theory of energy bands works?

    Why precisely is the lowest band a kind of band where electrons are not spatially mobile, and why are the electrons on the second band spatially mobile instead? Simply put, full bands are immobile and empty bands are immobile. Thus, if the first band is full, and the second half full, you have...
  18. J

    A bird and a train

    Well, lets say you have this senario: Meassuring EVERYTHING in reference to the train. In the train the airvelocity is zero. outside the airvelocity is negative 80 km/hour. (The speed of the train relative to the tracks). So outside you see a bird flapping its wings to stay in air, moving...
  19. J

    A paradox about Heisneberg Uncertainty ?

    So here a simple view of it: classical view: Momentum is carried in little matter-lumps called particles which at any given time are located at _one_ place in space, and have _one_ definite momentum. Now in QT momentum is carried in waves, which are not localized in space. one wave is...
  20. J

    Need Understandable Explanation Of Bell's Theorum

    So here's a layman's view of the case. At some time somebody in a lab presses a big red button and two entangled electrons are created moving in parallel but opposite direction. <--A B--> Now no matter which model you chose the particles have opposite spin. The difference is "when"...
Top