Jump to content

Sensei

Senior Members
  • Posts

    7927
  • Joined

  • Last visited

  • Days Won

    26

Everything posted by Sensei

  1. String theory is not confirmed. Confirmed theories are basing in experimental physics.
  2. If we cut blue photons (f.e. reflections, filter) from white spectrum, there will remain red and green, Red and green photons are read by our brain as yellow. I made this: (kinda yellow on my 1920x1080 pixels monitor) Zoom in: Just red and green pixels in columns. I mixed them in odd rows, blue filtered just 50%:
  3. Or reverse - flood of data like in microwave and IR region of spectrum. Which is visible in IR camera.
  4. I am kinda surprised that you're calling velocity and acceleration "dimensions". This way, you can call charge of charged particle yet another dimension.. And polarization another 3? Imagine simple math linear equation: f(x) = ax+b at x=0 f(0)=b x=1 f(1)=a+b x=2 f(2)=2a+b and so on with increasing x In this simple case x and y are dimensions, but a and b are not. X is like time, and a and b are parameters. They're not dimensions by them self. f(x) is predicting future "position" at different time x. Extend this to 3 spatial dimensions, and 1 time: x,y,z - position // increase of position by velocity vector every second (or fraction of second) x += vx; y += vy; z += vz; vx,vy,vz - velocity vector in m/s (it's kinda like a and b params in 1st example equation but extended to multi-dimensions) Then make vx,vy,vz variable in time: // increase of velocity by acceleration vector every second (or fraction of second) vx += ax; vy += ay; vz += az; ax,ay,az - acceleration vector vx,vy,vz, ax, ay, az are kinda like hidden variables. They're part of object. But not dimensions on their own. This is at least how it's implemented in the all modern 3d games. If something acts on 3D object, we change ax,ay,az of object, and this changes vx,vy,vz (in future), and this changes real positions (in future) (f.e. 60 frames per second: x+=vx/60.0;y+=vy/60.0;z+=vz/60.0;).. In the mean time there is performed collision detection to make sure objects don't overlap. Example: projectile fired by player will have x=player.x,y=player.y,z=player.z,vx=vy=vz=0, and ax,ay,az set to some high initial value in direction of shooting. Then by animating (decreasing) ax,ay,az in time, projectile position x,y,z will be dragged to the ground.
  5. That's why I am showing alternative methods of creation of antimatter (positrons) which is happening on daily basis during fusion, and beta decay plus.. http://en.wikipedia.org/wiki/Positron_emission
  6. Sensei

    War in Ukraine

    Russian people, you must wake up finally.. ! http://www.themoscowtimes.com/news/article/russian-mom-faces-treason-charges-for-call-to-ukrainian-embassy/515104.html "A Smolensk woman faces charges of high treason after she phoned Ukrainian diplomats to warn them that Russian troops may be en route to their country, newspaper Kommersant reported Thursday. The woman, identified in the report as a mother of seven named Svetlana Davydova, is currently being held in Moscow's Lefortovo pre-trial detention facility after a court issued an arrest warrant last week, according to the report. The alleged crime occurred last April, when Davydova contacted the Ukrainian Embassy in Moscow and told them that a military base near her home had been virtually emptied after the troops were sent somewhere, her husband, Anatoly Gorlov, was cited as saying by Kommersant. According to Gorlov, she had also overheard a Russian soldier from the local military base telling someone by phone on a bus that he was being sent on a mission. Fearing that Russian soldiers were being deployed to eastern Ukraine, she informed the Ukrainian Embassy of what she had heard." Original material http://tvrain.ru/articles/leviafan_svinolup_raspravil_plechi_pochemu_mnogodetnuju_smolenskuju_mat_obvinili_v_gosizmene-381282/
  7. Annihilation between electrons and their antimatter particles positrons is quite significant portion (4%) of our Sun released energy per second.. You should learn first how antimatter particles can be created.
  8. Who said about ONE ISOTOPE? Not me. "If we multiply isotope mass (from mass spectrometer) by natural abundance, repeat and add all other isotopes of same element we have average mass of element."
  9. I asked what *you* use now. To learn brand name, and model id, to look up on the Internet, and read parameters. Check whether brand is available in my country. Compare to what I used. And what recently shop owner offered me for $460. Whether it's fair price for parameters he mentioned..
  10. That's completely different level of accuracy than we're talking about.. Difference at 3rd digit after fraction dot in atomic mass unit i.e. 1.0078 is equal to +- 0.931 MeV, nearly two masses of electron! Difference at 5th digit after fraction dot in atomic mass unit is equal to +- 10 keV. I told it once. Repeating myself: from mass spectrometry.. Nonsense. Ask Swansont how mass spectrometry works. Masses obtained from mass spectrometry for different isotopes are quite accurate. Your comment is equal to claiming that databases of isotopes f.e. http://en.wikipedia.org/wiki/Isotopes_of_sulfur contain totally wrong data. Sulfur-32 31.97207100(15) Sulfur-33 32.97145876(15) Sulfur-34 33.96786690(12) Sulfur-36 35.96708076(20) Do you see brackets? That's what is uncertain.. Just two last digits prior bracket. That's +- few electron volts uncertain. Nowhere near +-10 keV nor +-931 keV like with 5th and 3rd digits wrong.. See how wrong is website link you gave: "1 H hydrogen min 1.00784 max 1.00811" 1.00784 * 931.494061 MeV = 938.7969744382 MeV 1.00811 * 931.494061 MeV = 939.0484778347 MeV What a garbage! Nearly 14 keV difference from real value! We know that Hydrogen-1 has mass-energy approximately: 938.272046 MeV + 0.5109989 MeV - 13.6 eV = 938.7830313 MeV 938.7830313 MeV / 931.494061 MeV = 1.0078250314 u What is isotope mass of Hydrogen-1 http://en.wikipedia.org/wiki/Isotopes_of_hydrogen ? 1.00782503207(10) That's precise answer to 9 digits after fraction dot.. When we will include also Deuterium mass: 1.0078250321 * 0.999885 = 1.0077091322 2.0141017778 * 0.000115 = 0.0002316217 1.0077091322 + 0.0002316217 = 1.0079407539 u That's quite good calculated average mass of Hydrogen. Rounding it to 1.008 u causes giant 56 keV difference. 56 keV * 6.022141*10^23 = 5.4 GJ of energy (that's wrong) (in 1 mole of Hydrogen)
  11. Hello! What brand and model of vacuum pump do you have, use and recommend? or alternatively which model do you disrecommend? Best Regards!
  12. Ions in water are surrounded by water molecules. Water is polar liquid. Oxygen in water molecule has negative charge, and Hydrogen in water molecule has positive charge. Electric field attracts or repels water drops, which can be seen on YouTube (or home experiment) f.e. Positive ion f.e. Na+ will align water molecules around it differently than Cl- One will attract Oxygen, other one will attract Hydrogen. Suppose so we have plate of copper/aluminium. One end we are connecting to battery positive electrode, other end to battery negative electrode. Positive electrode has absence of electrons, while negative electrode has abundance of electrons. They attract inside of battery. But once we close circuit, using our metal plate, they find a way through metal that will allow positive ion in positive electrode be filled by electron. At the beginning electron on metal plate (or wire) is used, then his neighborhood. and this goes, and goes, until reaching negative electrode. Imagine room with seats, and standing people. They run to have a seat. Once they find their chair, they are not moving anymore.
  13. 1000 ppm (per molecules) is 0.542% (per mass) which is 5420 ppm (per mass). Which is all already in SpreadSheet. So disagreement between one method over other is 5.42 times (with 1000 ppm (per mass)). 1000 ppm (per volume) is 0.1% (per volume) (with density p=1.84 g/cm3) which is 1838.4557 ppm (per mass). Look. I am not wrong, and you're not just right. We're just differently interpreting lack of information in brackets after ppm. We are obviously agreeing on how to interpret: ppm (per mass) and ppm (per volume) We are simply disagreeing on interpretation how to proceed when there is just "ppm" alone. ps. I am doing quantum physics. We do care about precise calculations.. Application visible on screen-shot is made by me. It has database of the all isotopes (3142), database of the all elements, and database of thousands of chemical compounds. If we multiply isotope mass (from mass spectrometer) by natural abundance, repeat and add all other isotopes of same element we have average mass of element. Then when we split chemical compound to elements, look up database for masses of elements, and add them together, we have mass of compound. Calculated. So compound doesn't have to be in database and right mass will appear. This application does it in real-time while entering data..
  14. It's not weird. It's your lack of knowledge of physics. "hole" is atom that has more protons than electrons. Thus overall positive charge. There is also reversed situation. Atom that has more electrons than protons. Thus overall negative charge. http://en.wikipedia.org/wiki/Ion http://en.wikipedia.org/wiki/Electron_hole f.e. electron jumps from one neutral atom hole-to-be to hole, filling it. Before we had charges 0 and +1, after we have charges +1 and 0. Then imagine queue of such atoms, one stealing electron from yet another in queue.
  15. Do you mean Greisen–Zatsepin–Kuzmin limit? http://en.wikipedia.org/wiki/Greisen%E2%80%93Zatsepin%E2%80%93Kuzmin_limit ps. I see no philosophy in this thread. Why it is not in mainstream physics?
  16. It's not estimation. I loaded database to text editor and pressed ctrl-end buttons, and read row number.. Exactly 2,777,114 words for date 2012 July 20. 3 years old pretty old db. I didn't update it loong time. There is added couple hundred words per week or so. When people find words that are missing. Typically variations of words that nobody thought about.
  17. In my language there is 2.78 million words and variations. The longest words have at least 15 characters. Many years ago I wrote C/C++ (and later .NET Framework C++) application which was using binary search algorithm on database (text file) for all these words and analyze them. I still have database (gathered from on-line scrabble game engine). You meant 52 billions rather (52,044,209,424)
  18. I run your commands on my MySQL server. All commands executed fine. Although I would add to them IF NOT EXISTS (if it'll be real program). You should read about INSERT INTO manual, if you have not already: http://dev.mysql.com/doc/refman/5.6/en/insert.html
  19. You didn't said in what language it should be.. C/C++/PHP? Read this f.e. http://www.w3schools.com/php/php_mysql_insert.asp http://www.w3schools.com/sql/sql_insert.asp Install MySQL Admin that allows executing SQL commands in text field. And experiment with different commands. You will see what effect they have on table and database.
  20. Moon is attracting mass of water (tides). The closer distance to Moon (like in the past) the stronger periodical attraction. http://en.wikipedia.org/wiki/Tide It might be interesting thing to simulate in game/animation. Players could pass through some lower level land only at certain dates. Land would be below water normally. Or make caves, which can be entered from water side. If you will generate whole world sphere, artificial borders disallowing to go (because it's outside of map, like this happens in typical game) would not be needed. Players going west will return on east or vice versa etc. ps. Show some screen-shots..
  21. You're wrong even with your example. If you dilute 1 gram of substance with 1 million grams of water you won't have 1 ppm (by mass), but less 1/1,000,001.. You need to dilute with 999,999 to have right proportions. Similarly if you dilute m1=1000 grams with m2=1,000,000 grams, m1+m2=1,001,000 grams. m1/(m1+m2) - concentration of first substance, m2/(m1+m2) - concentration of 2nd substance. If you're calculating concentration by using m1/m2, you would not even pass exam in our high school. On my language wikipedia page of ppm, there is said (google translator used): "ppm (parts per million) - way of expressing the concentration of a very dilute solutions of chemical compounds. This concentration is derived from the mole fraction and determines how much chemical compound per 1 million molecules of the solution." "The unit ppm is also sometimes used as a way to express a fraction of the weight, but usually only in this case specifically inform the writing eg. ppm (by weight). When the abbreviation ppm does not have any additional information to the contrary, that we are talking about the mole fraction."
  22. 1000 ppm (parts per million=particles=molecules in this case) of H2SO4 means that there is 999000 ppm H2O. H2SO4 has mass ~98.078 u. H2O has mass ~18.015 u. 1 u = 1 g / NA = 1 g/6.022141*1023 = ~ 1.66*10-24 g (atomic mass unit) 1000 * 98.078 u + 999000 * 18.015 u = 18095063 u. Mass of 1 million molecules solution. If we divide 98078 u/18095063 u, we will have normal mass fraction.
  23. Are you aware that we're sending/receiving radio transmission to our satellites far far away.. ? Voyager is farther than Pluto planet.. Delay between sending command, and receiving reply from device t=~2*d/c So it's proven that constant speed c holds for at least entire solar system. Not just experiments on Earth.
  24. That's correct video. Do you have oscilloscope? You can make experiment: connect normal AC, then AC with rectifying diode attached one direction, and then reverse. And compare results on oscilloscope screen. Rectifying diode allows electrons flow only in one direction, blocking opposite.
  25. Sounds like homework. Do you know what does mean "ppm"? Any scientist and student should know how to calculate ppm to moles and grams..
×
×
  • 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.