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Sensei

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Everything posted by Sensei

  1. Do you heard about Miller-Urey experiment? https://en.wikipedia.org/wiki/MillerUrey_experiment "After Miller's death in 2007, scientists examining sealed vials preserved from the original experiments were able to show that there were actually well over 20 different amino acids produced in Miller's original experiments. That is considerably more than what Miller originally reported, and more than the 20 that naturally occur in life" "This experiment inspired many others. In 1961, Joan Oró found that the nucleotide base adenine could be made from hydrogen cyanide (HCN) and ammonia in a water solution. His experiment produced a large amount of adenine, the molecules of which were formed from 5 molecules of HCN.[15] Also, many amino acids are formed from HCN and ammonia under these conditions.[16] Experiments conducted later showed that the other RNA and DNA nucleobases could be obtained through simulated prebiotic chemistry with a reducing atmosphere.[17]"
  2. To do that we would have to get into details like what are other constituents of alloy.. "The density of steel varies based on the alloying constituents but usually ranges between 7750 and 8050 kg/m3" https://en.wikipedia.org/wiki/Steel (not to mention it varies with temperature/pressure)
  3. "Modern alchemist" should first learn about atomic number of elements.. learn about protons and neutrons, how they transform, how they decay.. Lead has 82 protons in nucleus, while Gold has 79 protons in nucleus. If you will merge Pb+H you will get Bismuth (with Z=83 protons), not Gold.
  4. Or you could try Qt for Linux http://doc.qt.io/qt-5/linux.html Qt Creator, with GUI builder/designer https://en.wikipedia.org/wiki/Qt_Creator
  5. It was photographed by NASA Apollo expeditions and other satellites from opposite side.
  6. NASA revealed photos of space shuttle window hit by Micrometeoroid https://www.nasa.gov/centers/wstf/laboratories/hypervelocity/mmod.html
  7. LOL. If you start with steel ball with the same diameter as the Earth, they will have the same volume, but it'll be 43% more massive. Density of Iron is ~ 7874 kg/m^3, and density of Earth is ~ 5514 kg/m^3 ( 7874 kg / m^3 * volume of Earth ) / ( 5514 kg/m^3 * volume of Earth ) = 1.428
  8. If your plan is to get as fast as possible the largest number of negative votes, for writing rubbish, you're on the right track. Did you hear about Shoemaker-Levy comet hitting Jupiter.. ? https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9 Comet used to orbit around solar system for billion years, and boom, it's gone, finally it hit some planet. The same can, and will happen to other planets in this star system, sooner or later. Sun (in billion years from now) will turn to red giant and consume inner planets, and vaporize giant planets, because of much larger energy released at the end of its life.. Currently existing orbits are just metastable. And can be disturbed (relatively quickly) by unusual event like f.e. nearby flight of ejected planet, ejected hyper velocity star etc. etc. Orbits of planets are especially metastable in binary-star systems: https://en.wikipedia.org/wiki/Binary_star#Planets "While a number of binary star systems have been found to harbor extrasolar planets, such systems are comparatively rare compared to single star systems. E.g. observations by the Kepler space telescope have shown that most single stars of the same type as the Sun have plenty of planets, but only one-third of binary stars do. According to theoretical simulations,[72] even widely separated binary stars often disrupt the discs of rocky grains from which protoplanets form. " https://en.wikipedia.org/wiki/Two-body_problem_in_general_relativity https://en.wikipedia.org/wiki/Three-body_problem You should also read about accretion disk: https://en.wikipedia.org/wiki/Accretion_disk Formation and evolution of solar system: https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System
  9. According to Giant impact hypothesis, Moon is result of collision of other planet-to-be with Earth-to-be in the past. https://en.wikipedia.org/wiki/Giant-impact_hypothesis
  10. Assuming you're interested in writing applications for Windows/Intel using Visual Studio Express/Visual Studio Community, https://www.visualstudio.com/ please watch this video tutorial: This tutorial is for C#, but should be pretty easily adopted to C++ (.NET Framework is using Managed C++ version) https://msdn.microsoft.com/en-us/library/aa712574(v=vs.71).aspx ps. Fiveworlds asked the right question, because you didn't specify which platform you're interested in.
  11. People (in western world) will learn in school how to build robots, how to program computers, etc. etc. Then they will build their own robot, and tell him "go to work for me"..
  12. Your understanding of what is dimension, is like from sci-fi movie, unfortunately. You can't see or touch any dimension. You can move in dimension (x, y or z), or occupy it (f.e. 3D volume). Gamma rays can be seen. Or rather effects they have after hitting matter, when they ionize atom and electrons are ejected, or nucleus is photo-disintegrated, or when pair of matter-antimatter is created, etc. etc. Basically any particle can be detected only from the way it interact with other particles. This is how gamma rays and x-rays interact with matter: (title is incorrectly labeled "x ray interactions" while part of these interactions are only possible for gamma rays) Pair-production of matter-antimatter produces entangled particles. When you check spin or charge of one particle, you know that other particle will have opposite property value.
  13. People doing true intellectual work, are often all the time in work, as they think about problems they experienced in their projects even when they are far away from regular workplace.
  14. If something in modern physics is not right, you should come up with evidence.. https://en.wikipedia.org/wiki/Evidence "Evidence, broadly construed, is anything presented in support of an assertion.[1] This support may be strong or weak. The strongest type of evidence is that which provides direct proof of the truth of an assertion. At the other extreme is evidence that is merely consistent with an assertion but does not rule out other, contradictory assertions, as in circumstantial evidence." Section "Evidence in science" "In scientific research evidence is accumulated through observations of phenomena that occur in the natural world, or which are created as experiments in a laboratory or other controlled conditions. Scientific evidence usually goes towards supporting or rejecting a hypothesis." "One must always remember that the burden of proof is on the person making a contentious claim. Within science, this translates to the burden resting on presenters of a paper, in which the presenters argue for their specific findings. This paper is placed before a panel of judges where the presenter must defend the thesis against all challenges." "When evidence is contradictory to predicted expectations, the evidence and the ways of making it are often closely scrutinized (see experimenter's regress) and only at the end of this process is the hypothesis rejected: this can be referred to as 'refutation of the hypothesis'. The rules for evidence used by science are collected systematically in an attempt to avoid the bias inherent to anecdotal evidence." People on forum are banned because they're starting being pissed off and starting acting crazy after members of forum don't want to listen to their "wonderful pet theories changing the world".. while discussion with them about trivial science subjects, reveal that they're pretty incompetent, in classic physics, quantum physics, or even subjects they put on the plate by themselves and want to overthrow (like Relativity).
  15. Division, separation, is human-made classification basing on f.e. features of living organism (now it's DNA-test based: take DNA from some mammal, some monkey, some ape, some human, compare them and calculate how much they match each other). In the reality there is smooth, invisible to "somebody in the box", transition. Huge fundamental difference = inability to have offspring. Transition from one specie to other specie has no "sharp edge" between them.
  16. Sensei

    Qbasic

    LOL. QBasic has BEEP command http://www.qbasic.net/en/reference/qb11/Statement/BEEP.htm
  17. I would say that any larger application must be adjusting to environment. Take for example application with GUI. If user changes resolution of display screen, used font etc. in system configuration *), size of window, input device like mouse, tablet, application must detect it, and adjust accordingly to change. Applications with fixed window size (because they don't care about font size and display screen resolution), are very annoying for users. Another example, we compile base version of DLL for generic x86, yet another for CPU with SSE1, yet another for CPU with SSE2, yet another for CPU with SSE3, some AMD extensions, x64 etc. etc. And program during execution is checking which hardware/extensions are built-in CPU, and loads appropriately optimized version. Do you think above are examples of context-oriented programming.. ? *) it can be in the middle of running application. .NET Framework C#/C++ have special events that are send to controls and windows after user changed something in system.
  18. Electric field around charged particles diminishes with inverse-square law. Magnetic field even quicker. It's very easy to see electrically charged objects, because they're accelerating particles with opposite charge toward itself. In neutral environment charged particle goes straight line. But in presence of charged object, charged particle is attracted or repelled from it. So path is no more straight line.
  19. A force , must contain matter in the equation. If radioactive isotope decays through gamma emission, you have equation: [math]m_0 c^2=m_1 c^2 \gamma + h*f[/math] m0 - rest-mass of unstable isotope prior decay m1 - rest-mass of product isotope h*f - energy of emitted gamma photon [math]\gamma[/math] - Lorentz factor close to 1.0 If you have decaying neutral pi meson, you have equation: [math]m_0 c^2=h*f + h*f[/math] m0 - rest-mass of pion = ~ 134.9766 MeV/c^2 h*f - energy of emitted gamma photon = ~ 67.5 MeV
  20. That's way not enough. If you remember yesterday, short term memory gathered during day, were converted to chemical long term memory during sleeping. If somebody lose ability to convert one to another, he/she has Anterograde amnesia https://en.wikipedia.org/wiki/Anterograde_amnesia Do you remember "50 First Dates" movie? ps. I know, this opens yet another branch for this thread: how brain stores memories.
  21. Antiprotons are created since 1955, as you can see on wikipedia: https://en.wikipedia.org/wiki/Antiproton
  22. Device for separating ions is called mass spectrometer, as I already said in post #10. Device for storing ions is called magnetic trap/Penning trap. https://en.wikipedia.org/wiki/Magnetic_trap https://en.wikipedia.org/wiki/Penning_trap Didn't I already do it in post #10.. ?
  23. Intolerance is disease of soul/mind.
  24. Device to separate ions is called mass spectrometer. https://en.wikipedia.org/wiki/Mass_spectrometry It's working in vacuum. But it's not possible to get any useful current from it directly, as this method is using a lot of energy. Scientists used mass spectrometers (prior invention of less energy consuming methods) to separate Uranium-235 from Uranium-238, and then used it as fuel in weapons or as fuel pellets. Superconducting magnets are used in mass spectrometers to create powerful magnetic fields. https://en.wikipedia.org/wiki/Superconducting_magnet
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