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Sensei

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Everything posted by Sensei

  1. People don't want to waste time and energy describing a thing extensively. So searching for shortcuts. See how it works in SMS and Internet. You don't have to write whole "In Mine Humble Opinion" everytime just IMHO and everybody knows what you have in mind.
  2. I am getting nearly 2.7 years. ~4.1855 J per 1 g H2O from 20 C -> 100 C = ~335 J * 250 grams of H2O in cup = ~84 kJ = 84 million seconds with 0.001 W = 969 days. Correct?
  3. I am not sure whether you saw this video, from today 4 march: http://www.youtube.com/watch?v=6tFJKPHonm0 If I understood correctly they said "bitches are shooting" (at 0:40) and then continued walking to Russian's soldiers. "America is with us" (at 1:15). Officer tried to calm down his soldiers.
  4. jafari001, do you know how e (1.602*10^-19 C) is calculated/measured? In oil drop experiment: http://en.wikipedia.org/wiki/Oil_drop_experiment There is attached very high voltage to top and bottom plates (so electrons gather on top plate). Then oil drop with well known molecular formula and mass is ionized by x-rays passing through it, and becoming positively charged. Positively charged drop attracts with negative charges of electrons on top plate and oil drop is hovering in air. I=Q/t 1 A = 1 C/1s 1 C / 1.602*10^-19 C = 6.25*10^18 If 1 A of current flows through wire, you have 1/1.602e-19 = 6.25*10^18 electrons per second. If you will start making variable Q, then what will happen to I? You second equation q = (e/me) * T * (dm/dt) is simplifying to q=e for electrons. But what with ions such as OH-, Cl- and so on?
  5. That's YOURS, very speculative document.. q = root(4 * pi * epsilon0 * alpha * G) * T * dm/dt q = (e/me) * T * (dm/dt) so, root(4 * pi * epsilon0 * alpha * G) should be equal to (e/me), is that correct? so why I am receiving root(4 * pi * epsilon0 * alpha * G) = 7.36*10^-12, and (e/me) = 175850713501.647 ?? I just noticed "In this equation, alpha is a dimensionless parameter and is currently unknown;" So in other words you are using alpha constant for completely different thing. And it's not commonly known alpha constant used by mainstream physics.. ? ps. You can calculate "your alpha" using e/me.. But if you do so, you will see that you need as many "yours alpha constants" as there is particles, as every charged particle (except its antiparticle) has different mass..
  6. In other words, you have no bloody idea what are you talking about. You should start from that, to save our time..
  7. Incorrect. 237 kJ/mol of energy is needed per mole of water. It's 6.022141*10^23 molecules of water, that has mass 18 grams. For single molecule of water there is needed ~4*10^19 J or ~2.45 eV of energy. 2.45 eV is kinetic energy of single electron in 2.45 V potential difference. In practice electrolysis can be performed using half that voltage ~1.23 V. He didn't divide 241800 J by quantity of molecules. 237000 J / 6.022141e+23 = ~4e-19 J 4e-19 J / 1.602e-19 J = 2.45 Electronvolt energy. It's discussed with more details on Electrolysis of water wikipedia page in thermodynamics section: http://en.wikipedia.org/wiki/Electrolysis_of_water
  8. Quite the same can be said about integers - too big integer will cause overflow and completely wrong result. In machine code it can be detected by checking overflow flag in CPU status register. http://en.wikipedia.org/wiki/Overflow_flag But in high level languages, not possible to detect a posteriori.
  9. What if absorbed photon has completely different frequency than emitted.. ? What if emission happens millions or billion years after absorption? Plants absorbed energy from photons in Paleozoic, photosynthesis happened in them, and now after millions of years we are burning remains of them in furnaces.. And long time ago stored energy is used to heating and producing light right now. I am reminding you - energy is conserved. Of course not! Gravity is not material thing. Gravity of planet is result caused by billions of billions of particles. I said - particle absorbs energy, and result of it is acceleration of particle. The more energy it absorbed, the faster it's moving. f.e. if I have 25 cm^3 of hydrogen in test tube (~90 seconds of work of electrolysis with ~2.5 A in mine case) I am placing match or blowtorch below it, and see that hydrogen is expanding, its volume is increasing the more energy it absorbed. Molecules have higher velocity, so volume of gas is bigger and bigger. After turning fire off, gas is slowing cooling down and returning to initial volume. If I will touch and hold test tube by dry ice (that has -79 C), I will receive opposite result. Volume of gas will shrink. Cooled particles will have smaller velocity. According it ideal gas law, each molecule of gas is absorbing 1.38*10^-23 Joules of energy per 1 Kelvin temperature.
  10. Photon carries energy and momentum. When photon is absorbed by particle or molecule, it's energy and momentum is transfered to it, accelerating it. And photon disappears from the system. "Free" photons appears when material has too much energy, and wants to give it, but there is not enough surrounding it regular atoms or molecules. If you will take wire (especially alloy with higher resistance), pass current through it, it will become hot (it's accelerating air molecules surrounding it). But if you will place wire in vacuum, and pass current through it, it will start emitting light. In vacuum there is no air molecules which can take energy from hot wire, but it must lose that additional energy somehow (otherwise it would grow up to infinity). And creation of photon is the only way to lose too high energy. That's how light bulb works. No. I was only talking about quoting method. Question: IS IT GRAVITY THE MAIN SOURCE OF MOVEMENT? MAY BE THE ONLY? Answer: No. It's absorbed energy that's accelerating particles, molecules and objects.
  11. Kramer, your way to quote posts is making it very hard to read and follow.. Can't you simply use quote tool in toolbox above text area? It's on the left of twitter icon.. There is also important button on the left-top - switching on/off formatting of text during editing. I am using it all the time to copy'n'paste quote tags and adding quote ends..
  12. Fusion process is giving much more energy than fission. See table of fusion processes f.e. here http://en.wikipedia.org/wiki/D-T_fusion#Criteria_and_candidates_for_terrestrial_reactions Fission is serious source of energy in Earth's core. But it's completely not comparable to amount of energy produced by stars. For instance decay energy of Tritium to Helium-3 is just 18.6 keV, 5.7 keV in kinetic energy of emitted electron, and the rest in neutrino (lost permanently if neutrino will escape star). But Tritium fusion with Deuterium gives 17.6 MeV decay energy. That's nearly 1000 times more energy. If taking into account just 5.7 keV and 17.6 MeV (neutrino treating as lost) then it's 3000 more energy.
  13. Synthetic Hydrogen-4,5,6,7 are decaying through neutron emission to Hydrogen-3 very quickly, and then Tritium is decaying to Helium-3, but it's long time process with 12.32 years half-life (long in comparison to 1st stage). So why are you adding up these energies together? There can be years delay between decay of 4H-7H and then decay to He-3.
  14. It's simply too big to be true. Mass of electron is 9.11*10^-31 kg. Mass of proton is 1.67*10^-27 kg. Do you remember how electron and positron can be made in pair production? There are needed photons with f >= 1.23559*10^20 Hz (E >= 510999 eV). The rest answered in private message. Our rockets are accelerated by burning Hydrogen with Oxygen, and highly accelerated molecules of water are ejected from engine.
  15. What was first, egg or chicken.. ? If we have rocket with satellite on board and want it to stay fixed above one place of Earth, we have to accelerate rocket to certain speed, which you can pretty much approximate to: v = 2*PI*(r+h) / time r - radius of Earh 6378000 m h - altitude above surface time - one whole day in seconds ~86400 s, but we need to use sidereal day = 86164 s v = 2 * 3.14159265 * ( 6,378,000 + 35,786,000 ) / 86164 = 3074 m/s And that velocity you can find in this article http://en.wikipedia.org/wiki/Geostationary_orbit If satellite will lose that velocity it will be attracted to Earth, and suddenly destroyed in atmosphere. As long as it's going with that velocity or higher it's safe. Same is with planet - if it would collide with big enough fast moving object, it could slow down and lose its current orbit. Current orbits and current velocities around Sun are result of few billion years distant collisions and interactions with objects that are now part of planets.
  16. According to website http://en.wikipedia.org/wiki/Uranium_glass Uranium glassware is made of Diuranate. http://en.wikipedia.org/wiki/Diuranate I guess so OP doesn't know which is secondary metal..
  17. You wanted opposite cycle to neutron decay, so I gave it to you.. In the middle of link you should see (if you read it carefully): D+ + T+ -> He-4 + 3.5 MeV + n0 + 14.1 MeV That's how free neutron can be produced. One of dozen possible options.
  18. Sheever, read about nuclear fusion.. http://en.wikipedia.org/wiki/Nuclear_fusion
  19. Definitely not. Gamma photons can be result of annihilation of electron and positron, but also can be emitted by decaying nucleus (f.e. isomeric transition http://en.wikipedia.org/wiki/Nuclear_isomer ), or decaying pion 0 (for example).
  20. MS Paint by default is trying to save to BMP. Photoshop to PSD. JPG can have two file extensions .jpg and .jpeg If website is checking just for one (.jpg), it won't accept second one (.jpeg). It could also be case-sensitive. Just a thought.
  21. It sounds the same either in mine native language and provided by you English version. Nearly literally the same. Any layman (not to mention scientists) who has Crookes tube (which cost 70 usd on ebay) can conduct experiment at home and show that provided by him values are not correct. Thickness of material electron strikes and velocity of electron, have more influence on whether photon will be emitted, or electron will pass through it without collision. When we connect to it 1 A current it means there is 6.25*10^18 electrons emitted per second. If just 1 per 137 electrons has to emit photon as Susskind said, 6.25*10^18 / 137 = 4.56*10^16 photons emitted. It's just a matter of measuring intensity of light emitted by wall that's on electron's path. If you have not seen it at work click here http://en.wikipedia.org/wiki/Crookes_tube http://www.youtube.com/watch?v=CsjLYLW_3G0
  22. Use PNG or JPG below 2 MB size, if I recall correctly (after going to full editor, by clicking More Reply Options). I even managed to attach movie of electrolysis in other thread, but had to ZIP it first, so it's doable. ps. Instead of "pico cosmos" you should rather say "at quantum scale", if you wanted scale smaller than micro scale.
  23. So it appears that wikipedia has incorrect data. Can someone with wikipedia account fix it? Change row: "11C + e- -> 11B + Ve + 3.17 MeV" to "11C + e- -> 11B + Ve + 1.982 MeV"
  24. I agree with Swansont's statement from #13 post. This paragraph of book is almost certainly wrong.
  25. Okay, I found it on page 74. Thanks for pointers.
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