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Everything posted by Sensei

  1. ...tides are created by gravitational pull of the Moon..
  2. Reminds me disappearance of Kamino planet embarrassing scene in Star Wars universe: Human cannot search extraterrestrial intelligent life forms in star systems whose data and existence have been removed from the database on purpose. How to prevent extraterrestrial invasion of Earth in the future? One way, is to modify their databases, and pretend the Sun is not here, and the Earth does not exist. But it can work in the reverse direction.
  3. Sensei

    Sea level

    It is approximation which works for cans, glasses, aquariums etc. Attempt to calculate the real value for Earth case would be much harder. You would have to check how much of land lies below 1.5m or 1.9m altitude and include them in calculations.. When ocean water level rises lands are flooded.
  4. It requires external source of the energy. Some deep cosmos spaceships use decay energy from radioisotopes e.g. Plutonium (energy from the Sun is too low) https://en.m.wikipedia.org/wiki/Radioisotope_heater_unit
  5. Physics simulation engines split time to slices ("frames") e.g. 1/1000 of second. Every frame there are recalculated positions, velocities, accelerations, forces etc. Small imprecisions of floating point math adds up together. You can start with literally single object at 0,0,0 with velocity 1,0,0 and after a few seconds notice that object is not exactly at positions 1... 2... 3... 50... 1000.. as you would expect but e.g. 999.999x etc. etc.
  6. Typical game engine uses flat geometry i.e. gravity force vector is toward the ground in straight line in Y axis when in the reality it is toward center of mass, ~ core of the Earth. Game playfields are flat. Earth is spherical. Typical game engine has no air resistance, so if you would make e.g. pendulum it could work forever. Potential energy of bob is transformed to kinetic energy and then back to potential energy with the same amount. Without air resistance only imprecision of floating point numbers could lead to stopping it. Pay special attention to imprecision of the floating point math.
  7. Sensei

    Voting By Mail

    swansont, your description of United States sounds like hell on Earth... ...for some people..
  8. https://erj.ersjournals.com/content/early/2020/03/26/13993003.00688-2020 "Smokers and individuals with COPD have increased airway expression of ACE-2, which is the entry receptor for the COVID-19 virus. "
  9. https://en.wikipedia.org/wiki/Fukushima_Daiichi_nuclear_disaster#Hydrogen_explosions
  10. Two things are needed for fire: fuel and oxygen. Fuel without free access to Oxygen won't burn. Therefore the main way to shutdown fire is to use already burned hydrogen oxide. Water. However, at really really high temperature fires water molecule could be split to gaseous Hydrogen and gaseous Oxygen, which can lead to explosion. Such things happened in e.g. nuclear plants. Water used to cool down nuclear reactor has been split to gaseous Hydrogen, which later exploded and damaged nuclear plants.
  11. Sensei

    God in troubles...

    You know it is not true. One life form relies on other life form. There is fixed *) quantity of Carbon, Oxygen, Nitrogen and Hydrogen atoms, which are building blocks of the all organic molecules. And they are transferred one way or another from one life form to another. *) new one created in fusion, fission, radioactive decay etc.
  12. Sensei

    God in troubles...

    "diseases" are yet other life forms... Human beings think about themselves as superior to any other life forms.. While in the reality majority of life are single cell microorganisms.. If somebody would like to spread life to the entire Universe, should eject billions of billions of bacteria into cosmic space.. After millions or billions of years, one or a few lucky one survivors, would reach extraterrestrial appropriate environment and after a few next billions of years would evolve to millions of higher level multicellular life forms, perhaps intelligent one.. and repeat cycle once again.. Why God cannot get rid of "diseases"? Because the all higher level microorganisms, including human beings, relies on existence of single cellular life forms!
  13. Sensei

    God in troubles...

    ...are you in "deep learning mode".. my child?
  14. Sensei

    God in troubles...

    ...reunification with other extraterrestrial life forms.. ? ..or to simply say goodbye to not really adult lifeforms..
  15. Sensei

    God in troubles...

    Programmers call it breakpoint in debugger.. Triggered when there is something interesting to see.. or something like this (for a start): if( ( stars.getCount() > 0 ) && ( planets.getCount() > 0 ) && ( lifeforms.getCount() > 0 ) ) { Sound.playSound( soundLibrary.getSound( SoundLibrary::LifeForms ), Sound::LOUD ); }; ..and there is always log file to check history what people did in the past..
  16. No. They reacted accordingly. Only a bio-terrorist would like to make a virus at home.. If somebody asks here "how to make narcotics", or "how to make explosives" is banned almost instantly, as well..
  17. Not sure whether you are aware of this info guys, but he today threatened the Indian government for banning the export of this drug: https://www.bbc.com/news/world-asia-india-52180660
  18. Sensei

    Voting By Mail

    Voting by mail could be made more safer (i.e. harder to fraud) by splitting ballot paper to two parts. One part remains at hand of voter, second one is sent back to government. Everybody should make photography ("selfie") of their ballot paper after making check mark at the right places (the same on the both), but prior splitting them. This way it will be possible to verify whether election has been compromised after the fact. Obviously election committees counting votes must be made of members from the all parties and foreign independent watchers. Each committee member must count the all votes from his or her region (couple hundred to couple thousands). Results from the all election committee members must match. Then they release it to public by Internet and media takes care of the rest. Without special precautions voting by mail can be easily compromised. ps. I am generally advising voters to make selfie together with their ballot paper. Regardless if it is voting by mail or traditional.
  19. Coil can increase or decrease voltage between primary (input) and secondary winding (output). How much it increases or decreases depends on quantity of windings on either side. e.g. you can make transformer which creates both 5 V and 12 V at the same time, by using different quantity of windings, from the same input power source. Power (Psrc = Isrc * Usrc) of input is slightly higher than sum of power(s) of output(s) (Pdst = Idst * Udst). Lost energy is released as heat on transformer. If you will have no load element on output, you can still measure some tiny lost of power on the input. Easily checkable by plugging transformer without any output load to wattage meter. It should show very low current ~mA/uA or so. Or by measuring increase of temperature of transformer that does not have any load. Therefore people who want to decrease power consumption in the house use power strips with button and shut it down at once when the all devices plugged to it are not used e.g. over night. We can make equation like: Psrc = Pdst + Plost Isrc * Usrc = Idst * Udst + Plost or if there are multiple outputs: Isrc * Usrc = ( Idst1 * Udst1 + Idst2 * Udst2 ) + Plost Increasing input voltage above coil parameters will lead to overheating and might result in damage of wire in the windings not prepared to flow of current with much higher amount than expected. Typical way computer power supply unit ends up life is overheating of transformer caused by failure of the fan which cools it down. Damaged transformer can give too large current or voltage (shorted damaged windings = different quantity of windings) to the rest of computer hardware, and motherboard, CPU or other peripherals might be damaged in consequence.
  20. Invariability of physics and chemistry is one of postulates. If one region of the Universe would have different physical laws than other, observation of that region from Earth using telescopes would give different noticeable results. e.g. analyze of content of stars would not be possible. But it is giving consistent answers (at least locally). Scientists use spectral lines of known on the Earth elements to figure out composition of distant stars (including the Sun). You cannot fly to star and manually check its composition taking sample of it and fling back with it. Device would melt. What remains? Analyze of the light emitted by the star (or Sun). Variability of physical laws would tremendously complicate understanding of the Universe. Perhaps even completely disallowing to understand it. Scientists, without any the real evidences, hypothesize how such theoretical variability of physical laws would behave. e.g. different number of dimensions, different kind of forces and/or with different strengths ("what would happen if electromagnetic force would be weaker or stronger than it is in this Universe"), different decay rates of radioactive isotopes and/or particles (it could lead to shorter or longer life of stars). To check such hypothesis there can be created simulation. Universes with hypothetical properties existing only in computer memory.
  21. The best "economy" is to share everything that you can best give to this world, without requesting or requiring to pay any money. It is "economy" without rich or poor.. Without exploitation.. The problem is that the most of people do only things that they are paid for.. Without "award" (money) they do not do anything.. or do very very little..
  22. My point is that you have no idea what is going on the world.. therefore making untrue claims.. Today news from Ecuador: "Bodies are being left in the streets in an overwhelmed" https://edition.cnn.com/2020/04/03/americas/guayaquil-ecuador-overwhelmed-coronavirus-intl/index.html 10 mln jobless people in the US. Within two weeks. https://www.cnbc.com/2020/04/02/weekly-jobless-claims.html 15% jobless rate in Norway. The first time from the end of II world war. https://www.reuters.com/article/health-coronavirus-norway-unemployment/norways-unemployment-soars-to-record-14-7-of-work-force-idUSS8N2BJ039 Tell me. For how long do you think they will have money to buy food? The majority of people, in the majority of countries, lives from the weekly check, to the next weekly check, and after week without job won't have anything left.. Better to be prepared for the worst that did not come, than being unprepared in the moment when it happened.. Do you know what I suggest people here? To buy seeds and cell seeding trays.. Just to be prepared for shortage of food.. This can happen very quickly. Entire agriculture relies on extensive usage of energy. Shortage of fuel supply (e.g. because of collapse and anarchy in the country on the opposite side of the world, which used to sell your country fuel) will cause that harvesters and other agricultural devices won't work at full power, and trucks, and factories, won't deliver enough food to shops to feed the all people.. Therefor for many, many, years, I was "asking" to move to renewable energy sources. To be prepared. Now you are not prepared. Did you see my posts where I said that Japan is importing 60-70% of the all consumed food? I said it in many threads. They also have no natural energy sources. They are not prepared for lockdown of the entire world, and collapse of global trade. Collapse and anarchy in countries which export food to Japan, can cause mass starvation of Japanese people.
  23. Lockdown of the country causes that normal people do not go to parks, streets are empty, etc. etc. and leave no things that homeless people search in trashcans to sell them to get money..
  24. Are you mocking? Or are living in the parallel Universe to the rest of this world? I know homeless who have no food nor money to buy food and cannot even search for beer bottles and beer's Aluminum cans in trashcans because of lockdown of the country.. One thing I can agree with in your post..
  25. Names of researchers you can find in this article. https://www.telegraph.co.uk/news/health/news/8698244/Sun-sea-and-shrinking-brain-power.html
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