Jump to content


Senior Members
  • Content Count

  • Joined

  • Last visited

  • Days Won


Everything posted by Sensei

  1. Obama won't be elected 3rd time for presidency. Obama won't be changing constitution to fool people and ruling forever. Obama won't be changing his country to totalitarian country.
  2. You need to understand what is color in the first place. White light are photons with various frequencies in visible range. In wavelengths from 380 nm to 750 nm. When photon hits surface of material, it can be absorbed or absorbed and emitted. Emission can be in different range than absorption f.e. absorb ultraviolet and emit visible light. White surface in white light is white, because all photons are reflected. Pretty none are absorbed. If source of light is not white (some frequencies will be missing), white surface won't appear white to our eyes. If you have red source of light (like in old fashion photographer room), white wall will appear red (wavelengths 380nm to ~600nm are missing). Red surface in white light is red, because red photons (~620nm - 750 nm wavelengths) are reflected from it, and all others are absorbed. Green grass and leafs in white light is green, because green photons (~500 nm... 570 nm wavelengths) are reflected, and all others are absorbed (and used in photosynthesis). Color of material tells us how material reacts to photons with given frequency/wavelength/energy.
  3. No. And no. Energy is in Joules unit. Which is kg * meter^2 * second^-2 1g = 0.001 kg c= 299792458 m/s so E=0.001*299792458^2 = 8.9875517873681764e+13 J To release this energy there would be needed antimatter. Reread what I said in #4 post. Radioactive decay is splitting particle that is initially at rest, to couple particles with high energy-momentum-velocity. It's much easier to see mass-energy equivalence when you know how to calculate released energy (decay energy).
  4. On the other hand "being at rest" means that whole environment you are in has the same velocity as you. Which gives illusion of lack of movement. When you are in airplane toilet without windows, and airplane has constant velocity, you don't know whether you're flying or still on ground.
  5. Split of Church of England from Rome happened in 1534. Newton born in 1643. 109 years later. Thank you for mixing everything up. http://en.wikipedia.org/wiki/King_James_Version English translation of Bible is from 1604-1611. King James died before Newton born.
  6. Learn how to calculate Decay Energy of isotope. It's showing how mass changes to energy in decaying unstable isotope. Newly produced particles are accelerated to very high speed and escaping parent element. As your knowledge seems to be very rough, I will show you video how radioactive decay looks like: https://www.youtube.com/watch?v=ZLiXgdymIYE Long thin traces are the most likely from electrons (you can check it by placing magnet or electromagnet and observing bending of trace). Short thick traces are from alpha particle. The longer trace, the more energy had particle. https://www.youtube.com/watch?v=VFVZU2YwwJ4
  7. Sensei

    Alpha Decay

    I think so it's theoretical question (or tricky). No matter if this isotope undergoes such decay or not. Do you know how many protons have sulfur? Do you know how many neutrons have sulfur-34? Do you know how many protons and neutrons have alpha particle? If you know all above, you can calculate simple way what will be result element. Then check isotope mass and you can even calculate Decay Energy. Hypothetical, because it's stable.
  8. Better later, than ever. Safer. None of them will be able to push trigger or assault neighborhood countries..
  9. Russians are happy? You wouldn't have to drink so much of vodka to feel happy... Cheap vodka and everybody are happy. It's too easy.
  10. Putin WANTED war. Wanted that Ukraine soldiers will start firing. That's why whole army was waiting for on the border. To take eastern and south part of Ukraine. But Ukraine government was informed by CIA to not open fire, instead filming everything openly and walking without guns. Which complicated whole plan. There was time for preparation. Stock market investors are not long term investors. They can jump in and out in a day. Especially RTS that's listed in London. If he would bother about national interest he wouldn't prepare Sochi. Wasting 50 billions of dollar for 2 weeks entertainment in country that's barely breathing is pure stupidity. he will be gone before the end of this year..
  11. In http://en.wikipedia.org/wiki/Geothermal_electricity there is "El Salvador, Kenya, the Philippines, Iceland and Costa Rica generate more than 15% of their electricity from geothermal sources." But it's just these couple countries. Not entire world.
  12. ... to destroy russia. Not a single investor with brain will waste money in russia now in long term investments.. At least until putin is alive.
  13. Where do you have such data? http://en.wikipedia.org/wiki/Renewable_energy
  14. russia has only parades of nuclear rockets... What a nonsense are you writing again? Quote with translation: "In 1914 Russian Orthodox Church had 55173 churchs and 550 monasteries. There was 113629 clerics and 95259 monks. Repressions from communists government before II war and after II war brought significant marginalization of Russian Orthodox Church. In 1939 structures were in vestigial form, legally worked only couple hundred churchs and not a single monastery." http://en.wikipedia.org/wiki/Russian_Orthodox_Church#Under_Communist_rule "In the first five years after the Bolshevik revolution, 28 bishops and 1,200 priests were executed." Are you talking about "life of spirit" after being executed by communists government, right?
  15. Look at OpenGL perspective transformation matrix. http://www.opengl.org/sdk/docs/man2/xhtml/gluPerspective.xml http://www.opengl.org/sdk/docs/man2/xhtml/glFrustum.xml OpenGL transforms first 3d object coordinate to 3d world coordinate (multiply vector 3x1 by matrix 4x4) (glMatrixMode GL_MODELVIEW), then multiply result by perspective matrix (glMatrixMode GL_PROJECTION). After that you have x,y on screen and depth (which is used to z-buffer). Analyze this transformation matrix, and you will have math. It'll be easier than you think- distance between lanterns is same, and their heights are also the same.
  16. It appears so, if you're saying that children seeing gays will become gays.. Quoting you "but there are children who have a weak mind,and if they see gay,they will begin to ask ourselves what it is,and normal health child can be damaged."
  17. You have skewed informations about gays. They feel desire for person with the same sex as they. Colloquially speaking true man gay has erection only with man, and feel disinterest to woman (no erection). How do you want to change heterosexual children to gay?
  18. You don't become gay because of looking at gay... or parade..
  19. Singing song is not act of hooliganism..
  20. I have not magnetized piece of iron (in mine case it's 80 mm x 8 mm x 8 mm bar), and attach to it small neodymium magnet (8 mm diameter 3 mm height cylinder, single one is powerful enough to hold 1 kg mass, just tested) from one end of iron bar, whole surface of iron bar is becoming one large magnet.. it's attracting f.e. capacitors and needles that are on mine desk Disconnect magnet, and iron bar is not longer attracting anything. You should get such device for visualization of magnetic field lines (it's array of compasses): It costs ~40 usd here.
  21. You should. It's good tool for scientists to measure masses of different atoms, especially metals. You can do it during electrolysis of water with different metal electrodes, with voltage and amper meters connected and precise test tube with volume scale.
  22. If you have f.e. 1 kg of water, it means there is 3.345*10^25 molecules of H2O. Which means there is 6.691*10^25 atoms of Hydrogen and 3.345*10^25 atoms of Oxygen.
  23. Who said they traveled airplane? Maybe they simply car drive. 3000 km / 100 km = 30 * 7 L/100 km used by engine = 210 L of oil or gasoline. What is price of oil/gasoline in russia? I have here $1.8 (yeah, we have quite expensive) 210 * 1.8 = $371 If we split to 4 persons in car, each has to pay $93. You really can't afford paying one hundred dollars? Really?
  24. Corruption has nothing to do with amount of money, percentage of salary etc. It can be even $10-$20. Corruption is when official (paid by government in the most of cases) requires client to pay to do something, or not to do his job. Examples: - doctor receiving money for better caring patient in hospital. - doctor moving patient waiting for treatment in queue up. - police officer canceling ticket for gift. - police officer telling details about investigation. - official picking up offer from company after receiving money, instead of picking up the best offer from the all offers provided by companies. This is the most harmful to country from the all listed here. The best way to get rid of corruption is introduction of lie tests. Let's take for example police office taking money for canceling ticket: Ticket cost $100 for instance. It's obvious that "gift" must be significant less that ticket (say 50%), otherwise whole bribery wouldn't make sense. Why somebody would like to pay more than that? Such police officer must take a few bribes per day to have significant impact on his salary. Money from tickets that would go normally to government, are ending up in his pocket. So again government is the most damaged. Client and officer are happy. One paid less, officer have secondary salary.
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.