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Showing content with the highest reputation on 07/24/18 in all areas

  1. Even some quantum physics who worked on Manhattan project died because of radiation released because of their mistake in couple days after accident: https://en.wikipedia.org/wiki/Louis_Slotin https://en.wikipedia.org/wiki/Harry_Daghlian Byproduct of fission of Uranium-235 is e.g. Caesium-137, which is soluble in water, and can spread on the large area, in clouds and rain, and then drunk by people in liquid contaminated water. When radioactive isotope decays inside of living organism, it's causing random damage of cell and DNA. https://en.wikipedia.org/wiki/Caesium-137 Other byproducts of fission are Strontium and Barium-141, which replace Calcium in bones of living organisms, and can remain in them for longer time, and then decay. Barium-141 can beta minus decay to Lantanum-141 and then can alpha decay to Caesium-137: [math]^{141}_{56}Ba \rightarrow ^{141}_{57}La + e^- + \bar{v}_e[/math] [math]^{141}_{57}La \rightarrow ^{137}_{55}Cs + ^4_2He[/math] or it can alpha decay to Xenon-137, then it can beta minus decay to Caesium-137: [math]^{141}_{56}Ba \rightarrow ^{137}_{54}Xe + ^4_2He[/math] [math]^{137}_{54}Xe \rightarrow ^{137}_{55}Cs + e^- + \bar{v}_e[/math]
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  2. The more rigorous a definition is, the less it usually applies to. Don't you need a definition broad enough to encompass what most would call "creative"? To me, being creative can be as simple as putting things together in a way you never have before. Only if you're talking about art, and even then I don't consider an observer essential. Much of what we do in life is about following familiar patterns to get what we want. We know the formulas for many mundane acts, and we know exactly what should happen when we invoke them. To me, creativity is an attempt to change the pattern without knowing what the outcome will be. It's like stepping off the road to investigate a narrow path. It might end up being a shorter route, it might lead to a dead end, or it just might lead to the most beautiful place you've ever been.
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  3. If you're converting from m^2 to cm^2 you need to divide by 100 twice (because 1 m^2 is 100*100 cm^2 = 10000 cm^2). e.g. 1.9*10^9 N/m^2 is 1.9*10^5 N/cm^2...
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  4. 1) radioactive isotope of Carbon C-14 or Potassium K-40 decayed in the wrong molecule, in the wrong moment, destroyed DNA of some cell, caused mutation, which resulted in cancer.. 2) primary (or secondary) cosmic ray particle (the most likely from the Sun), hit DNA molecule, or surrounding it molecules, transformed them, and damaged DNA like above.. 3) free radical reacted with DNA, damaging it.. 4) [....] Some mothers, and fathers, "asked" for it by them self, by drinking alcohol, using cigarettes and narcotics, eating unhealthy and/or carcinogenic food.. Now we have "flood of stupidity", i.e. anti-vaccine movement.. If such people will win, and persuade politicians and spread their stupidity worldwide, we will see more children suffering illnesses almost destroyed in XX century in western countries, and you will go back to XIX century and earlier..
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  5. Karma doesn't exist. Someone made it up. Like all the other silly religious and semi-religious hoo ha. It was invented at a time when everything was mysterious, and there was very little scientific knowledge. You can understand people inventing these things, when there is nothing better on offer. People still hold to some of it now, through wishful thinking, and indoctrination.
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  6. This question (which is a common one) is based on a westernised (mis-)understanding of karma that has little to do with the original concept as it was conceived in Eastern philosophy. Karma is not a deterministic process, and it is not an external principle of “reward and judgement”. The basic idea is simply that any intentional (!) action will have future consequences of some kind; but the reverse is not true - not everything that happens is necessarily the deterministic consequence of some past karma. It needs to be remembered that in Eastern philosophical systems, there are two types of causation - there is linear causation, and there is synchronous causation. Linear causation connections events over time, whereas synchronous causation connects objects and events in the present. Both of these are always active, so both the past and the present influence what happens to us in our lives. This means that yes, if you intentionally harm others, it will in all likelihood eventually come back to you in some shape or form (linear causation); but a child can also die in an Earthquake, or catch some horrible disease, simply on account of having - by pure coincidence - been at the wrong place at the wrong time, and without this being the result of any intentional action in the past. The cut a long story short - karma (intentional action) influences events, but it does not determine them. It is not a principle of moral judgement, and was never intended like that. This sounds more like the “problem of evil” in theistic religions, which is different from the concept of karma.
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  7. Not really most calculators only go to 10 digits. Servers usually have a max int 2,147,483,647 . Javascript has a max int 2 ^ 53.
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  8. Do you feel Escalator racing game can be introduced in future Olympics games? There will be two categories 1 Bottom to Top escalator race. 2 Top to Bottom escalator race. There will be 8-10 escalators depending upon the number of participants representing their country. 150 steps of same constant moving staircase speed in the 8-10 escalators. Skills required will be speed, balance, concentration & focus for the participants. Thanks & Regards, Prashant S Akerkar
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  9. Thanks. Archery - Bow & Arrow sport. Do you feel the law of conservation of momentum can be applied in physics? Thanks & Regards, Prashant S Akerkar
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