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Sensei

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Everything posted by Sensei

  1. Quite hilarious comment. Sort of your style. https://en.wikipedia.org/wiki/Roman_conquest_of_Britain Emperor Claudius, invaded Great Britain, because old pretender to crown of Britain island (or Scottish, or Celtic? if you like) escaped, taking crown together with him, to Rome. British new lords sent insulting message to emperor Claudius, literally to order him to return crown and regalia. They had to be insane. If they would sent polite and reasonable message, they would get regalia without a problem... For insult Claudius, refused to do so, and attacked British island. After capturing lords were not executed, instead taken to Rome, and lived long life, they asked him "why did you attacked us, peasants, when the all shops in Rome city looks (better than) like our country treasury.. ?" (crying)
  2. If you emit single photon, photon by photon, with any delays between them, result after some time, is diffraction or interference pattern. Energy/frequency/wavelength of photon is used in (diffraction/interference) calcs. [math]E=h*f[/math] [math]f=\frac{E}{h}[/math] [math]f=\frac{c}{\lambda}[/math] [math]E=\frac{h*c}{\lambda}[/math] [math]\lambda=\frac{h*c}{E}[/math] Photons could be red-shifted or blue-shifted because of Relativistic Doppler Effect: [math]f=f_0*(1-v)*\gamma=f_0*\sqrt{\frac{1-v}{1+v}}[/math] [math]f=f_0*(1+v)*\gamma=f_0*\sqrt{\frac{1+v}{1-v}}[/math] If you emit single electron, electron by electron, with any delays between them, result after some time, is diffraction or interference pattern. Kinetic energy/momentum/velocity of electron is used in calcs. [math]E.K.=m_ec^2*\gamma-m_ec^2[/math] [math]p=m_e*v*\gamma[/math] where [math]h=6.62607004*10^{-34}J*s[/math] [math]c=299792458 \frac{m}{s}[/math] [math]\gamma =\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}[/math]
  3. If somebody plays games seriously, also dream about play while sleeping. And it's pretty insane/unhealthy. I remember times when I played 14h per day scrabble-clone. Have been playing also while sleeping. 14h with 3-5 minutes per player (*2) is enough to play 100 times per day and win. There is needed to find healthy compromise. But then "good bye" to be in the top players. Top players have couple seven-letters words in single game. From 2.8+ millions words database.. Some on-line poker players, who plays the whole day, some day go to the real world poker tournament, and crash it. On-line poker player can play 800+ games per day. High pro players are joining multiple "rooms" at the same time on couple monitors and playing them simultaneously while waiting for opponents movement. Normal world players are not used to such quantity and experience.
  4. You concentrated on hobby of that person, to discredit him. Why? Manager can't play music in his free time? While his wikipedia page says: "He graduated in political science at the University of Silesia in Katowice and postgraduate MBA , validated by the Rotterdam School of Management Erasmus University [ 1 ] . He worked as director of sales , " the Silesian Tribune " [ 2 ] . He was the director of the office of marketing and promotion of the Polish Post has worked in management positions in the company PKO Polish Bank , among others, as managing director of marketing retail bank PKO BP and Chairman of the Supervisory Board of Inteligo Financial Services In 2005-2007, Chairman of the Supervisory Board of PKP In 2006, he served as a mediator in the labor dispute against wage demands in PKP Cargo. From 28 January 2008 to 29 January 2013 Chairman of the Board of the company [ 1 ] in which it restructured . In April 2012, he was chairman of the board of LOT Polish Airlines . He is also vice president of the Employers of Poland , and Vice President of the European Organisation for Public Sector Employers" PKO - the biggest Polish bank, LOT - the biggest Polish Airline. PKP - the biggest Polish railway. Western managers are used to western standards of operation. And there are possibilities: - they will try to take western standards and adopt them successfully. - they will try to take western standards and fail. - they will sink and being corrupted by existing system.
  5. Studying English and science is advice good for everybody, not just Ukrainians. Poorly educated people can be easily stupefied, and manipulated. By clerics, priests, imams, clerks or government.
  6. Professor Balcerowicz, nominated to Nobel prize, Milton Friedman Prize winner, joined Ukrainian government, week ago: http://uatoday.tv/politics/architect-of-polish-reforms-joins-ukrainian-government-636101.html "Leszek Balcerowicz was the Polish Deputy Prime Minister and Minister of Finance in the 90s. He is known for implementing a "shock therapy", the economic reforms in Poland often referred to as the Balcerowicz Plan." To large part of Polish "low class" not well educated people, this might sound very controversial. As he fired the majority of Polish workers in '90, leaving just those required to sustain production, and increased productivity. While fired suffered from these movements, some to this day.
  7. I can translate what you write by myself using Google, as I did above. But wanted to know what makes Swedish easier than English. And hoped you have some objective examples. I thought so you say something else than just "I learned it first, so it's easier for me", as it's too obvious. Everybody thinks that their native language is easier. Our brain is thinking internally in native language. When you don't speak, just thinking about something, internal voice is in native language. f.e. any word not existing originally in language has to be adopted to target language. Or new one has to be invented. Easier to adopt existing foreign word. Unless it has bad connotations. f.e. computer and computers. English word. Just two variations depending on quantity. We had to adopt it. And it became komputer. But our language has many variations of single word depending on context. It became: komputer,komputerom,komputery,komputerowi,komputerowemu, komputerek,komputerki,komputerkowy,komputerkowi,komputerkowemu, skomputeryzowany,skomputeryzowanego,skomputeryzowanemu (it translates to English deskill/computerize) komputerowiec,komputerowcy,komputerowcom,komputerowcowi ("computer expert"/"computer man") I am not good in humanistic and linguistic disputes, even in my own language. Humanistic person would probably easily find >30 variations of this word. From 2 original English word, there is made dozen of our own language words, and you need to know which word to use depending on context of whole phrase. Scrabble game dictionary had 2.8 millions words and their variations, the last time I checked. Welcome in club. In almost every single post I write here I have to open English dictionary, to check words I want to use, just in case.. You have to learn "thinking in English". Instead of "I want to tell this (in Swedish, or other)". Then figure out how to translate, I am since the beginning making phrase in English in brain. Don't translate, but think in English language since the beginning, while writing.
  8. Maybe it is not Magnesium.. ? Can you make photo? Within couple seconds it should be covered by Hydrogen bubbles What happens when water is heated to f.e. boiling point.. ? Do you have enough of it to measure its density? It should be much lighter (1.738 g/cm3) than Aluminium (2.7 g/cm3)
  9. Moderator removed link. Such posts without reference people are/were pointing to, are complete useless in further discussion.
  10. If you divide 0.123 g by mass of Ammoniac, and divide 0.325 g by mass of Water, you have moles. Divide one by another, and you see there is ratio 1:2.5, or 2:5 (we can't have fractions). Draw 2 molecules of Ammonic and 5 molecules of Water, discard Hydrogen, and start joining remaining atoms, remembering rules how they join with other atoms (f.e. oxidation state they could exist). What do you get? There is one compound which matches it perfectly. Actually you cannot join it with water, because it will create Nitric Acid (Anhydride of Nitric Acid).
  11. Stop producing guns, and armors and Kevlar won't be needed...
  12. Sensei

    Dark holes.

    150 mln km / 300k km/s = 8 min 20 sec Slightly less, but not much, because light is emitted from surface of Sun, not its center.
  13. Particles are not mathematical objects. Mathematics is used to describe their properties, and interactions with other particles.
  14. Watched (again) "Star Trek: Nemesis" this week, and while fight between starships there was sound (in vacuum). Doesn't count as "basic physics flaw" too.. ? Not to mention teleportation all the time used by Star Trek team, while in Star Wars I don't recall teleportation.
  15. Since you know both English and Swedish, how about showing us, especially one who doesn't know Swedish, in which ways it's easier on some examples.
  16. You didn't understand. Physics and chemistry lessons are typically learned by different teachers. So they don't know each other what and which students know already, and knowledge is often repeated for everybody, even often overlapping. Same was f.e. with electronics lessons and physics. I had ohm law on physics, then on electronics. Repeating does not hurt. It's a way to better memorize knowledge.
  17. You electrolyzed piece of magnesium? Do you mean solid magnesium? Underwater? Magnesium reacts (at higher temperatures violently) with water to form Magnesium Hydroxide and Hydrogen gas. MgO also reacts with water, forming Mg(OH)2 So you could have Mg(OH)2 ,which is white, and almost not soluble, layer on the bottom of container with water. If you want to make MgO from Mg(OH)2 you should boil entire water, and then continue, increase temperature above 332 C. It's mentioned on wikipedia https://en.wikipedia.org/wiki/Magnesium_hydroxide When I was doing electrolysis with sodium bicarbonate alone and 2L water, using 230 V, electrodes were also covered by black material. Even if electrodes were 24 carat Gold. Without presence of Magnesium. It's carbon layer.
  18. Attach photo of your brain activity. If I were you, I would take it from my doctors for sure.. If my computer CPU is running at 100%, I know there is some buggy application in infinite loop. And has to be shutdown or computer will malfunction due to overheating. 100% CPU should be used only while processing serious amount of data. Same with brain. Active only when it's busy.
  19. Experimental physicists today are f.e. accelerating particles and hit them each other, and detectors around chamber center where they collided are one by one sending signal "we have hit". Then computer analyze data, time needed to send signal from chamber to detector is measured, its strength, to reproduce where used to be particle that f.e. decayed.. In the past there was used Cloud Chamber, Bubble Chamber, and traces of particle that decayed were visible on photographs, and x-ray photos, How that can be wrong? Build your own particle detector, for 30-50 usd, and you can see whatever physicists in university see. http://www.scienceforums.net/topic/92998-universal-evolutionary-process/page-4#entry900023 http://www.scienceforums.net/topic/92471-the-limits-of-physics/#entry894800 Here you have links to how to build the cheapest one particle detector.. You can have your own photos from your own particle detector this week, just spend 30 usd, instead for beer, build device. And you will be able to make your own experiments, and see by your own eyes, whether knowledge that you read here, is true or not. You should specify what exactly you think is wrong, and what is not wrong.
  20. Cu2O has Cu in I oxidation state, (Copper(I) oxide) while CuO has Cu in II oxidation state. (Copper(II) oxide) Empirical difference between them is reddish color of Cu2O, while CuO is black.
  21. It matters when you learned it the first time, not the last time. I had it the first time, on physics, in primary school, or early high school Ideal gas law was proposed by Clapeyron https://en.wikipedia.org/wiki/Benoît_Paul_Émile_Clapeyron "Benoît Paul Émile Clapeyron 26 February 1799 – 28 January 1864) was a French engineer and physicist, one of the founders of thermodynamics." (wikipedia doesn't mention he was chemist, according to current terminology) Everybody who is doing thermodynamics starts from ideal gas law. https://en.wikipedia.org/wiki/Thermodynamics "Thermodynamics is a branch of physics concerned with heat and temperature and their relation to energy and work." Obviously chemistry lesson must have it, so the same as lessons about protons and electrons bound together to form Hydrogen, then to H2 gas, and how to make it, in reaction releasing this gas. So the same electronics lessons mentioning about electrons. It's quite inevitable. Classic physics deal with physical object changing state (like solid<->liquid<->gas<->plasma), and how they behave over time, in some system, and never deal with change of contents of compounds. Nobody will be learning on physics what happens if you use HCl + NaOH->NaCl+H2O. It belongs to chemistry lessons. In the case of quantum physics, decay of unstable isotope to other element, change this. But it's special case.
  22. It was a slip of the tongue. Of course I meant "gas law is physics".
  23. Gas law is physics, not chemistry. and second question is rather.. psychology? Neither one fits chemistry section though..
  24. GPS in mobile phone is not very accurate. Its reading jumps few meters to dozen of meters. My Samsung Galaxy S5 has options to enable/disable GPS from satellite and/or "GPS" from cell towers. There is huge difference in quality of signal from satellites and cell towers. Which can be easily seen turning one or the other on/off and walking city with Google Maps for instance. In village with a few distant cell towers around situation can be different and GPS from satellites could show more accurate result. I have written Android app reading GPS from device, putting data to database, writing CSV file row, and adding it to listview on the screen. Then wait second, or specified amount of time, and repeat. It's consuming battery as hell. Walking with Google Maps turned on, and we can literally see how percentage of available power is decreasing, IIRC 1-2% per minute of usage, so whole battery lasted for 70-80 minutes of experiment. But everybody have mobile phone with GPS these days. It's just a matter of writing software for existing device at hand. BTW, It's illegal to distribute and sell Android app which is monitoring activity of user without his/her knowledge and permission in the Google Play Store. So unfortunately won't be able to release soft for f.e. monitoring wife/husband activity. At least not without making whole website and store.
  25. Which gas do you want to showcase in discharge tube? Each gas has slightly different color, spectrum lines of element, revealing transitions. Hydrogen? Oxygen? Then you need to know how to produce them, like here, while electrolysis of water: (don't use typical Gold ring, as it's 14 or 18 carat Gold, with 58.333% and 75% Gold abundance, the secondary metal will react and destroy your ring) Maybe Carbon Dioxide gas? From reaction between Sodium Bicarbonate and almost any acid (Acetic Acid is cheap and widely available). Once you have round-bottom flask filled by gas of your choice, you need power supply of high voltage. It could be Van de Graaff generator, Cockcroft-Walton generator. Depends on what you have at hand. And put wires to up-side-down placed flask, in such way they wont be connected, wet, and don't introduce Oxygen to flask (especially important with Hydrogen). Decreasing pressure of gas in tube/flask, would help to reduce needed voltage to start discharge. Once you have ready discharge tube, you can pass light from it through prism, and show spectral lines on some white screen, calibrated and with scale 400nm to 700nm.
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