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Sensei

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Sensei last won the day on September 24

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    Quantum Physics, C/C++/.NET Framework/Java programming.
  • Favorite Area of Science
    Quantum Physics

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  1. ...apparently "lost in time"..
  2. Really? Where? 1) "Parallel Universe".. 2) Or: ps. Haven't you seen the TV series where the nazis win WWII and the US is divided between Japan and Nazi Germany? Tom Swanson would be leader of guerrillas.. ? (I will see ("observe") this Parallel Universe and I'll tell you what you did there...)
  3. Majority of ordinary people in the world, including politicians, government officials, and even including members of this forum (looking at the posts that pop up every time there is a discussion about "rich people" and taxing them) have been fooled by the "Billionaires List" in various newspapers/magazines.. These lists are compiled based on the stock prices of companies that "rich people" own, control or have a stake in. Very confusing to properly assess their wealth. For example: Elon Musk is 2nd on the Forbes list.. right? Wrong, incorrect, and misleading information! https://www.google.com/search?q=tesla+debts "Tesla had started 2017 with $3.4 billion in cash but had $10.2 billion in debt. This was a negative cash position of $6.8 billion." https://www.google.com/search?q=tesla+debts+2020 "According to the Tesla’s most recent financial statement as reported on July 28, 2020, total debt is at $14.10 billion, with $10.42 billion in long-term debt and $3.68 billion in current debt. Adjusting for $8.62 billion in cash-equivalents, the company has a net debt of $5.48 billion." https://finance.yahoo.com/news/teslas-debt-overview-120614517.html Share prices are out of touch with reality, artificially inflated by demand, by corporate marketing, by CEO personality/celebrity etc. Share prices reflect not the real (current) valuation of the company, but the futuristic, possibly unattainable future goals of the company. Any attempt to sell a majority (or enough significant amount) of shares could lead to a price collapse if no one is found willing to buy them back. Stock is often used by financial institutions as collateral for loans. A drop in the price of the stock below threshold in details of loan, forces the financial institution to request another surety and/or sell the stock, causing the price to drop even more.
  4. If we're on taxes and taxing billionaires, there's the question of which country with which people in government, and whether they're willing to spend the money they raise more optimally than a billionaire can do himself/herself.. If a billionaire spends money on luxury items, the money barely reaches the bottom of the economic food chain.. If he/she invests money (in non-financial industries), new jobs, new industries, new opportunities are created.. This is a mathematical equation with many variables that change over time and space.... rather than an ethical one.... Bees, ants, termites etc. social animals work for the goodness, prosperity, happiness of the entire group and family to which they belong without any money.. Can you create more and efficiently with your neighbours and family than if you paid them or they paid you? Money has degenerated human.. degradated human.. unequalled human.. partitioned humans.. People started doing many evil/inappropriate things they wouldn't do if money wouldn't exist.
  5. You can print a graph by typing the equation into Wolfram Alpha, and you will see (at least graphically) if it (or any equation) is near zero (or in any other range): https://www.wolframalpha.com/input/?i=(+x^4%2F(85^2+%2B+x)) for equation "( x^4/(85^2 + x))"
  6. Yes. Paid studies create many pathologies, such as poor students taking out loans and/or having a second parallel job to even attend college. A full-time job reduces the time by 8hrs a day that they can devote to their studies, increasing the chance of failure. If a student fails, the loan does not disappear. An exceptionally bad start in life with long-term consequences. It would be interesting to see the statistics of failed studies per country, the cost of those studies, and the percentage of students who took out loans for them and how quickly they paid them back. And similar data. From your personal experience: what was the initial number of students in your major and how many of them "made it" to the end and graduated? Free studies can also create patologies. e.g. carelessly choosing a course of study for oneself and easily dropping out at no cost at any time without serious consequences, which, with limited seats in the class, means that someone more suitable was rejected and had no chance to participate. There are people who do not value what they got for free and/or take it for granted. The number of seats in a class each year is limited. This is a natural barrier to too many students in one subject of study. The best ones pass through. They have a chance to successfully complete.
  7. Try instead: NSolve[( x^4/(85^2 + x)) == 1,x]
  8. In different versions of Android you change it slightly differently. In my I simply type "font" (the local language equivalent). Font sizes are stored in sp units (scalable pixels). Other elements dimensions and borders are in dp units (density-independent pixels). https://developer.android.com/training/multiscreen/screendensities Adjust it to Small. Restart device. Adjust back to Large. Maybe what is displayed in UI was no stored in config files. It can happen if application's activity is delaying saving settings to onPause/onStop/onDestroy, but sometimes Android OS don't execute these methods (especially in out of memory situations, or when app is terminated due to crash, i.e. when app is unexpectedly shutdown)
  9. Scientists in laboratories can create a single photon at a time and detect a single photon at a time. Scientists in laboratories can eject and accelerate a single electron at a time and detect a single electron at a time. Scientists in laboratories can eject and accelerate a single quantum particle at a time and detect a single quantum particle at a time. Want to see them? Build Cloud Chamber: Here we have a single quantum particle, of various types (e.g. electron, proton, alpha, muon, pion, kaon), accelerated to near the speed of light, colliding and decelerating with atoms in the medium... or a simulation of it, if you are a "brain in a vat". What does it mean to "see something"? The scientific version: atoms in your retina are excited by photons and create electrical impulses. https://en.wikipedia.org/wiki/Retina "In the photoreceptors, exposure to light hyperpolarizes the membrane in a series of graded shifts. The outer cell segment contains a photopigment. Inside the cell the normal levels of cyclic guanosine monophosphate (cGMP) keep the Na+ channel open, and thus in the resting state the cell is depolarised. The photon causes the retinal bound to the receptor protein to isomerise to trans-retinal. This causes the receptor to activate multiple G-proteins. This in turn causes the Ga-subunit of the protein to activate a phosphodiesterase (PDE6), which degrades cGMP, resulting in the closing of Na+ cyclic nucleotide-gated ion channels (CNGs). Thus the cell is hyperpolarised. The amount of neurotransmitter released is reduced in bright light and increases as light levels fall. The actual photopigment is bleached away in bright light and only replaced as a chemical process, so in a transition from bright light to darkness the eye can take up to thirty minutes to reach full sensitivity." Do you see electric field, magnetic field, gravitational field? No. You see just EFFECTS of these fields on surrounding environment i.e. how other quantum or macroscopic objects change path and react to them. If you see something, does that mean it exists? There are people who claim to see something or someone, hallucinating, after or without abusing psychedelics or drugs. In the middle of this photograph, we see an arrow < that marks two particles coming from nowhere. How is this possible? An electric neutral quantum particle leaves no trace, but its decay produced two new, extremely highly accelerated charged particles. Again, we only see the effect and do not see the source. Therefore, the gap is filled by the theory (undetectable neutral quantum particle).
  10. I think physicists fall into two main groups: theoretical and experimental. It's easy to be a theoretical scientist because it costs nothing, all you need is a piece of paper or a blackboard, but rarely is a theoretical scientist successful, i.e. most theories end up in the trashcan. This is in contrast to experimental scientists. They work in laboratories (CERN, particle accelerators), performing experiments and find discoveries. Einstein did not get the Nobel Prize for his theoretical work. He got it for his explanation and formula for the photoelectric effect. You may have a mistaken impression of scientists on the science websites, because online scientists mostly respond to posts from laymen coming up with new revolutionary theories. They have some "most liked" topics: black holes, dark matter, dark energy, and GUT. All these are topics for which there are no scientific answers as it is impossible or nearly impossible (for now or ever) to study these phenomena experimentally. If you are looking at the Sun, a star or a distant galaxy, your eye, a scientist's telescope, has just absorbed photons. Billions+ of photons with properties: frequency and polarization. The more photons detected ("measured"), the better the image quality. How can you know... to be absolutely sure... the Sun, stars, distant galaxies really exist and are what you think they are? No one has flown there. No one has touched them. If they really exist and are what physicists think they are, no one will ever get to them because they will burn up any device. Therefore in physics we have a division between direct measurements and indirect measurements. https://www.google.com/search?q=indirect+measurement+physics
  11. Internet and especially social networks redefined/degenerated words "friend" and "friendship".. "5 minutes" after registration to Internet social network you are flooded by people from all continents asking for adding them to your friend's list.
  12. An increase in the Earth's average temperature will increase water temperatures. Cold water loving krill will die disrupting the marine food chain, which will affect all humans living near the sea. Some already hot areas in Africa and Asia will become even hotter, making it impossible for people to live there. The result will be a mass migration of people fleeing to more livable regions of the planet such as Europe, North America or Siberia. The influx of peoples will be massive and uncontrollable. This will inevitably cause irritation and protest among the indigenous peoples of the EU, USA, Russia and Canada. I have serious doubts about the validity of your statement that more people die from cold than from heat. Poor African and Asian countries do not make reliable statistics on deaths from overheating and e.g. getting a stroke.
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