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Sensei

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Everything posted by Sensei

  1. I don't have issues with quoting. But here is 120 Mbps Internet. I noticed that when Internet was tremendously lagging, quote on forum didn't work as expected. After pressing "Quote" button there was long delay. And quote was empty. Happened maybe twice in the entire everyday usage of this forum in the last 3 years since Oct 2013 when I joined. It's plausible that forum is using jQuery/aJax that is asynchronously called. If there is time-out (because of lagging Internet), no returned reply, but quote function cannot wait any longer, have to return activity to user/browser, and have to return empty text. (just thinking out loud) Instead of pressing "Quote" button you can simply enter on keyboard [ quote ] (copy'n'paste selected text) [ /quote ] (without spaces). ps. You might also check your DNS. Perhaps somebody/hacker/spy intercepted it, and you're using one you should not be using. ps2. Do you have personal firewall which is showing the all activity/packets send/received by machine? ps3. Start > cmd [enter], enter "ping www.scienceforums.net" [enter] What time do you see? I have 43-45 mili seconds right now. If you want more samples use "ping www.scienceforums.net -t". You will have to manually break it with ctrl-c. (ping is using ICMP typically, but HTTP is on 80 TCP/IP) ps4. Why forum does not use HTTPS SSL port 443? It should. For safety of members.
  2. In Special Relativity Relativistic Doppler Effect has formula [math]f=f_0(1+v)\gamma[/math] [math]\gamma=\frac{1}{\sqrt{1-v^2}}[/math] Which is also equal to [math]f=f_0\sqrt{\frac{1+v}{1-v}}[/math] with v normalized to 0...1 (divided by c). With v near 1.0 (or near c, without normalization), gamma is so high that regular photons at visible spectrum (average 2.32 eV green photon), could be blueshifted to more than 1.022 MeV (0.4-0.5 million times than green photon) In such situation there is starting pair production, of matter and antimatter, and positrons are starting annihilating with body of spacecraft, damaging it and destroying.
  3. Radioactivity/nuclear physics Irène Joliot-Curie https://en.wikipedia.org/wiki/Irène_Joliot-Curie Astronomy/astrophysics Cecilia Payne-Gaposchkin https://en.wikipedia.org/wiki/Cecilia_Payne-Gaposchkin cooperated and was inspired by: Annie Jump Cannon https://en.wikipedia.org/wiki/Annie_Jump_Cannon Sarah Frances Whiting https://en.wikipedia.org/wiki/Sarah_Frances_Whiting Henrietta Swan Leavitt https://en.wikipedia.org/wiki/Henrietta_Swan_Leavitt Antonia Maury https://en.wikipedia.org/wiki/Antonia_Maury
  4. That's what for are computers.. To compute If some application has not sufficient built-in features (or they're too slow), you can always make your own application (with little GUI or command-line). You will spend time writing program, and get result quickly, instead of spending time calculating everything on paper. From time to time, it's good to make some computing manually, though.
  5. CaCO3 reacts with acid f.e. acetic acid giving off CO2 gaseous which could be gathered and its volume measured (wait for reaching room temperature). If polyacrylate does not react with acetic acid or other weak acid but reacts with CaCO3, you could determine amount of CaCO3 this way (if measuring its amount is your the main aim). Another possibility is (at least temporarily) making Calcium Bicarbonate Ca(HCO3)2 as intermediate byproduct. Have it been in hermetic container? Had it access to air (so could absorb CO2 from it)? https://en.wikipedia.org/wiki/Calcium_bicarbonate " The term does not refer to a known solid compound; it exists only in aqueous solution containing the calcium (Ca2+), bicarbonate (HCO3−), and carbonate (CO32−) ions, together with dissolved carbon dioxide (CO2). " Calcium Bicarbonate after heating turns to Calcium Carbonate water and Carbon Dioxide Ca(HCO3)2->CaCO3+H2O+CO2 then CaCO3 undergoes further decomposition. CaCO3->CaO+CO2 (so double as much Carbon Dioxide produced than what you would expect from pure CaCO3)
  6. Tidal heating of moon orbiting around lonely planet without star, could produce enough heat and temperature for life to appear or at least sustain existing one. https://en.wikipedia.org/wiki/Tidal_heating_of_Io Living organisms requiring visible light, like plants, would be not possible, without light obviously.
  7. Milky Way has diameter approximately 180,000 light years. Solar System is ~ 27,000 light years away from the center. So what you can see from Southern Hemisphere (that's direction to the center of galaxy, and further) is ~180/2+27=117 kly. Light from these stars have been emitted just up to 120,000 years ago. From the center of galaxy 27,000 years ago. Compare with age of Earth, age of Solar System, age of Milky Way. In so small amount of time, you would have barely visible movement of continents on the Earth. And you are dreaming about serious change of gravitational force?
  8. I am using OpenOffice Calc It's free and you can download it from http://www.openoffice.org/download/
  9. Link provided. According to rules of this forum, that you agreed upon signing in, you should provide everything to discuss, without requiring users to click anything. That has sense: if you link to your own website, or your own post on other forum, you can change whatever is there any time. While discussion on forum will be about old version of text, rendering whole discussion senseless, if change is significant. So, why don't you just copy and paste whatever you wrote on another forum, if you really don't want to repeat yourself.. ? Are you afraid of perhaps pointing errors in interpretation.. ? ps. Unlike what you think, I didn't neg your post #36, so there was no reason for revenge neg my post #37.
  10. Sound wave passing through air medium, when sound has enough strength is visible by fast recording camera. See some explosion video. There is often visible on them where is sonic boom https://en.wikipedia.org/wiki/Sonic_boom Because light passing through air bends path slightly differently while wave is passing through the medium. Shock wave https://en.wikipedia.org/wiki/Shock_wave visible on photo of nuclear explosion
  11. Do you have this jar in your hand? Are you interested in jar volume inside space, or total.. ? Remove temporarily gummy worms. Put on weighing scale, reset it. Fill jar by water. Read weight. Density of water is 1 g/cm3. So 1 g = 1 cm3. f.e. if you have 800 grams, it means inside volume is approximately 800 cm3. If you're interested in total volume use Archimedes' principle. From math point of view: jar looks like having equal two sides, volume of box is V=a*b*c, but b=c, so V=a*b*b (not pretty accurate, as your jar has slightly rounded corners) If you don't have jar, and simply can't measure width,height,depth, You could estimate proportions from image, by counting pixels in some painting application (they usually show length of line). And then do adjustment for perspective distortion. Photoshop has such option to distort image in perspective, which could be reversed to turn perspective view to flat front side view.
  12. I am doing it. And probably others too. This way you are flooded by reports from normal members.. One spam post, ends up, perhaps in dozen reports to mods.. (maybe info "This post has been reported to mods for review"? This would eliminate duplicate report) While accepting/rejecting 1st post from somebody newly registered is much less work. How many new members register per day, and write new 1st post? Isn't looking at forum and seeing flood of spam all sections turning away potential new members as well.. ?
  13. Or put new members posts to mod queue until reviewing by any mod, and approving it.
  14. Then turn on digital camera, or couple of them from various angles, show company name, box etc, show it does not detect anything. Show that they're really gold (density 19.3 g/cm3) and silver (reaction with nitric acid?) etc. Dismount device to show what is inside in front of camera. Upload to YouTube. One version of movie edited, and second one raw, from various cameras to show it's not manipulation. Just in case. People should be warned against fraud.
  15. If I would have such device in my hands I would put below it gold, silver, paper money, and other things to check whether it works, or not, and in what circumstances. Did you do it?
  16. Absolutely. Poor people even with free eduction for everybody could end up not educated. As they have no money to survive and early have to go to work (or criminal activity) to even be able to fed them self. Even more important is to get rid of money entirely. Nobody pays for anything. Nobody asks for money anyone. Everybody do what is their responsibility: the best they can, work for society, using their brain or muscles, or both, if needed. Everybody receive everything for free. Currently pressure on society is made by money. Somebody who is useless for society, get nothing back from society, and ends up with nothing, searching for food in garbage. Target is money for such society. Homeless (or even not literally homeless *): government can learn all these people how to make their own homes. How to make bricks, how to work with concrete, how to cut metal sheets and rods, how to weld them, to make skeleton to be filled by concrete.. It's harder job to influence these people that they can do it by them self. They lost life goal. Their only goal is to find food in trashcan, and have money for cheap alcohol, eventually for drugs. *) I bet somebody would prefer spending 3 months on construction site of his/her new home building (preferably as high as possible, to save ground area), rather than have to have 30+ years loan.. I watched TV document about US Amish, the whole village gathered one day, and built house for one of them, from wood. Women were making meal in mean time. Nobody asked for money, nobody paid. They knew when time come, they will do the same for him/her family, building yet another house, in return for helping them now. That used to work for centuries, and thousands years ago. It's unbelievable that you're talking about killing people, even in jokes, as a way to "fix overpopulation". IMHO there is no overpopulation. There is wrong target, wrong distribution of what is available. Majority of people seeking for "richness", instead of dreaming f.e. about "endless life" (every single rich would swap with somebody living a day longer than he/she) or doing something important for community.. Little target for couple years: Moon, Mars, the whole Solar System, then further in galaxy. Instead of wasting life doing nothing.. Over and over, repeated by the next generations of people doing basically nothing..
  17. How it could be beside the point? He asked "And you can verify this by the tidal forces on its surface (and interior) (of Moon) ?" So, I explained him, how observation of moving away Moon is performed (by precise measurement of distance using Retroreflector in dozen years). Actually, Moon does not move in a circle, but ellipse, with perigee 356400-370400 km, and apogee 404000-406700 km.
  18. Moon is moving away from Earth, just ~38 mm per year. It's ~0.1 mm per day. Astronauts who landed on the Moon, leaved there special device called Retroreflector https://en.wikipedia.org/wiki/Retroreflector Read about Lunar Laser Ranging experiment https://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment
  19. If you would cure somebody, who is ancestor of f.e. Einstein or other scientist, making tiny, tiny, ridiculous tiny movement, saving his/her life, like some Italian young women who I met couple days ago, she took snail from the road, where he/she would be inevitably smashed by cars, (I told her, I am taking 30+ such snails from road every time I go the road, after the rain), but that snail, could be ancestor of entire new race of organisms, living in the future world, after III or IV or V world war... She would become mother of the all living organisms in the future, by taking snail from road and putting on the grass, and no one would remember her name... Except me..
  20. I just wrote mail to my government that they should make factory of Cloud Chambers, Peltier cooled, to put them in the every primary school, middle, and universities.. In the hall. And physics class room. Children should be accustomized with quantum physics since the early age of their life.
  21. With them? All the time? On the street? Restaurant? Discotheque.. ? In the large discotheques there are metal detectors in the front door to disallow carrying anything dangerous inside..
  22. I am reading in the first place local (my country) newspapers. In my country, I don't even remember when the last time I heard that somebody shoot somebody (couple years ago by russian guy).. Personally I do not know any single person with a gun. Or license to have a gun. ps. It's sort of we're in parallel universes.. If I see police officer, he/she is saying to me "good morning, sir".. In your's they shoot first, and then ask for ID.. The last time (~week ago), police officer were saying something to me that sounded like "excuse me, sir, please cross this street to second side. Thank you".
  23. I'm confused how the hell police officers can distinguish "good guys with guns" from "bad guys with guns" in the "middle of battle".. (not to mention your title is sexists, because you assume only male is terrorist-to-be (or mass-killer-to-be), while female is not)
  24. Somebody who bothers about money should not be scientists, similarly, somebody who bothers about money should not be doctor, (now there is plentiful young people "I want to become doctor, to be rich.." WTF?! It's wrong answer, wrong attitude).. The main reason for somebody wanting to be a scientist, should be to find something unknown, discovery, or at least theory, and this way leave some trace of his/her existence in the history of human kind. The main reason for somebody wanting to be a doctor, should be to help people, relieve their pain, save their life. Desire of money is disgusting.. Nobody now asks, or bothers, whether some ancient time philosopher, had money to buy food everyday.. What bothers people is what legacy he/she leaved, in his/her papers. Marie Curie Sklodowska and her husband didn't patent the ways to isolate unstable isotopes from Uranium ore (and then she had to ask US government to give samples, after increase of price of Uranium/byproducts, because of worldwide demand for it "In 1921, Marie was welcomed triumphantly when she toured the United States to raise funds for research on radium. Mrs. William Brown Meloney, after interviewing Marie, created a Marie Curie Radium Fund and raised money to buy radium, publicising her trip.[46][55] In 1921, US President Warren G. Harding received her at the White House to present her with the 1 gram of radium collected in the United States." https://en.wikipedia.org/wiki/Marie_Curie ) She, and her the whole family, received the greatest number of Nobel prize in the history. Learn programming C/C++/C#, and write some program related to biotechnology/chemistry/science that you will sell to institutes..
  25. Still waiting for your Chlorine-38 interpretation.. (post #22)
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