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MigL

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Everything posted by MigL

  1. I wouldn't exactly call it a pop-sci myth. The Event Horizon is a condition of the space-time surrounding the collapsed mass-energy. At the Event Horizon, a mathematical condition is exceeded, but there is no actual physical structure. One can say that the space-time surrounding the collapsed object is the source of Hawking radiation, and you would be correct. You could say that the condition of the space-time is the source, or you could say the EH is the source, and you would still be correct. I've also read of many 'mechanisms' for Hawking radiation production, ranging from the virtual particle pair capture and emission ( as real ) which you described, to particles ( radiation ) tunneling through the EH, as if the EH was a real structure, and many other 'interpretational' mathematical models which give the same results. ( this is a Quantum Mechanical effect, after all ) What is certain is that BHs have entropy, and therefore must have a temperature. That temperature requires them to emit radiation characteristic of a black body at that temperature. Here are two differing 'interpretational' mechanisms for radiation production from a google search Hawking Particle Creation.pdf (brainmaster.com) 0409024.pdf (arxiv.org) Both are fairly understandable ( math light ) and don''t give me 'headaches' when reading them 🙂 .
  2. This has nothing to do with science, or even common sense. It is nothing but politically ( with religious basis in Southern States ) motivated agenda. In Canada, every once in a while, a conservative MP brings up the abortion issue, but is quickly slapped down by the rest of his/her caucus. There is an 'understanding' where none of the parties, nor the courts, will touch the issue. I don't know how American political has gotten to the point where the people elected to make laws have given up that responsibility to unelected courts, who are, in no way, beholden to the wishes of the electorate. American politics suck !
  3. Unfortunately, 'truth' is subjective, Moon. I'm somewhat mentally lethargic today. What is the meaning of "Fifty billion flies ..." ?
  4. Another problem which your American election system pioneered ( and now seems to be spreading to other democracies around the world ) is the inability of your two parties, and their Presidential nominees, to present a platform to the electorate, Probably because House and Senate cannot work together, or with the President, to get anything done. All we hear in election ads is the 'mis-steps of the opponent(s). You hear it here too "Sure Biden is old, and may have lost some of his wits, but at least he's not crazy Trump." And from the other side "At least Trump can find his way off the stage and doesn't need to be escorted." Aren't you guys setting the Presidential bar a bit low, if all you need is to be able to find your way off a stage and not be crazy while doing it? ( says the guy with the drama teacher in 'black face' PM who got elected on his father's name and hasn't kept a single election promise )
  5. Most computers don't have very good shielding ( they need to meet a maximum radiation limit ), and they will emit some radiate at frequencies much below that of the CPU. Modern CPUs operate at up yo 4 GHz, and other processes on the motherboard at lower speeds in the hundreds of MHz range. Coincidentally, the range of Microwave frequencies is from about 300KHz to about 30 GHz. I still think your health issues are unrelated.
  6. I put 'stronger' in quotes to mean a candidate that is capable of a dominant win over D Trump, so we can finally be rid of the fear of him running, and possibly winning, again. But you make a valid point, some of their strongest candidates would be women. In K Harris' case, however, I was more impressed with her before becoming VP than during the last 3 years. ( I assume VPs are meant to be mostly MIA, but I remember J Biden being a much more visible as VP during the Obama Presidency ) The Democrats should have used this time to make her a household name, and a contender for the Presidency. Even if J Biden squaks out a win this year, they will need someone in 4 years who is known, trusted, and not a 'scary' woman. Scary is in quotes not because of any attitude I may have, but because a large number of Americans don't seem ready or willing to have a strong woman in the Presidency. ( us Canadians; JC, Peterkin and I, had one 30+ years ago; a Conservative, even )
  7. No one is arguing the fact that J Biden is waaaay better than D Trump. But I do wish the Democrats had a 'stronger' candidate to field.
  8. It would have to be a maser , or a large reflective dish antenna focused on your house ( which you would see ), to specifically target your house. Microwaves and radio waves are not directional nor well focused; your whole neighborhood would be affected. If no one else in the neighborhood is showing similar symptoms, I suggest you contact health care professionals. It might well be something totally different which needs to be addressed right away.
  9. Wow ! You really have it in for banks. What happened ? Did they deny you a loan 😄 ? ( everyone has the option of not using a bank, and living within their means )
  10. Due to lower birth rates and people living longer, there are more and more old people than young. You would deny these people representation in their government based simply on age, not competence ? Might as well simply exterminate them, as they are in the way of an evolving society. Remember, you hope to get to that age too, someday 🙂 . My arguments for age limits are based on the average competence ( if one can define such a thing ) of 70-90 year olds: not on their opinions of how society should evolve, as, I assume, if they are competent they'll have valid opinions.
  11. Should I then, assume that, if I was a far -away observer of accretion disc plasma falling into a Black Hole, I see radiation because I am also in ( far away ) free fall ? Yet, If I'm close to the BH, blasting my rocket to stay a 'supported' distance away, I would detect no radiation as it is beyond a horizon ?
  12. When was the last time a Christian or a Jew got stoned ( not on drugs ) for adultery ? When was the last time a Muslim woman got flogged ( or stoned ) for adultery, or even for being raped ? Sadly it is never the men, even the rapists. ( so much for the rights of women, or even wives ) This is the 21st Century, all other religions realize that a religion based on thousand year old texts cannot be governance or the law. When is Islam going to realize that ?
  13. Yes they do. But such interactions tend to make the accretion disk planar; see Saturn's rings for an example. Further, such interactions would be random, and would produce random radiation. The inspiralling accretion disk produces a very specific radiation pattern, polar jets, of the type associated with orbiting charges. All 'active' Black Holes display such jets; some around early massive galactic center BHs produce jets that outshine the parent galaxy, and are known as Quasars. Since the infalling plasma of the accretion disk is in free fall, why is the radiation apparent/accessible to an outside observer ?
  14. Sure old man. Thursday of what year ? The new advertising model is a definite improvement. You don't have to click any windows closed. However, when I'm reading posts I always think there's a video attachment, and I'm disappointed when it's only an ad.
  15. We had this discussion a few years back, and @Markus Hanke participated in it. At the time, he convincingly stated that an accelerometer attached to a free-falling charged particle shows no acceleration, so there is no reason to radiate. I'm willing to re-open the discussion, perhaps in a split-off thread as it is off-topic here, to address your question, as well as my own ( which is at least, more closely related to the OP ) The accretion disk of a Black Hole strips atoms of their electrons, leaving charged particles spiraling towards the Event Horizon. These charged particles are in free fall, and BHs with accretion disks emit massive amounts of radiation as polar jets. It would seem that observational evidence supports radiation from free falling charges.
  16. I just need my 'fix', String Junky. Doesn't matter where it's from.
  17. The Sun converts 620 million tons of Hydrogen into 606 million tons of Helium each second ( from Wikipedia ). The energy of the bound state of the Helium nucleus is manifested as a mass deficit or binding energy, totaling 14 million tons every second. This 14 million ton mass deficit/binding energy eventually makes its way to the surface, where most of it is radiated into space as energetic radiation, and makes life possible on our planet. Pretty darn amazing for something that is not real and only useful for calculations. Actually the mass of the three quarks that make up nucleons ( protons and neutrons ) is only about 2% of the nucleon's mass. The rest is binding energy of the color interaction. By your logic 98% of the 'mass' of a nucleon is not 'real'. IOW energy is just as 'real' as mass. We don't actually measure mass; we measure weight. Mass is determined from energetic interactions, such as reaction to a field ( Earth's gravity being most obvious ), momentum conservation in collisions, etc. This 14
  18. Boots are a different matter; I have 20 year old cowboy boots that cost $600 Can back then. None of my sneakers or running shoes are over a year old. But while on the subject of comparing/complaining about totally different things ... I have a fully automated espresso machine that only needs water, coffee beans and the push of a button. It cost me $2500 Can two years ago. It is currently not working properly, and needs over $400 Can in repairs. I used a stove top percolator for a bit. I like the aroma when it percolates but hate the wait. So I bought a $150 Can Nespresso machine and use $30 Can for 100 pods from CostCo instead of $15 Can bags of coffee beans. The espresso is fast, just as good, and I can almost get another two machines for the cost of repairing my 'good' one, never mind buying another. Someties 'better' isn't always a better idea. ( I just had to get this story off my chest; it makes me so angry ! )
  19. running shoes are disposable; buy cheap ones. Expensive ones only line the pockets of large corporations that use child labor to manufacture them. And are a status symbol for spoilt rich kids.
  20. OMG ! Et tu, Bufofrog. Reading Capiert's posts actually hurts ... Now you're doing it too ?
  21. There is no such thing. The relationship is between energy and mass. They are different facets of the same thing; one being the ability or potential to do something, the other being the resistance to doing something. Are you maybe under the impression that light is energy? That is another common misconception because we get energy from the Sun as light. Light is siply the vehicle that transfers energy from the Sun to the Earth. Both renergy, and mass, are properties of systems ( and/or matter ), and so light has the property of energy, but it has no mass. However, in special circumstances, its property of energy can be converted, so that energetic ( but massless ) light gives rise to two particles with mass ( but much less energy ). The process can also be reversed so that two massive particles can annihilate to become a photon of light. These processes involve many other properties of systems ( and matter ) such as momentum and charge, which dictate if and how the processes evolve. As Sensei mentioned, the subject gets complicated very quickly; I hope I helped with some of the basics.
  22. "Context of the quote' refers to the rest of the speech embedding the quote. "Times and circumstances when it was made' refers to a time and situation/place. Did you enjoy that ? 😄 ( sorry, couldn't resist )
  23. Quantum foam 'exists' ( ? ) at a scale where space-time becomes chaotic, and virtual particles b( the ones without a defined position or momentum )pop in and out of existence ( for an undefined time ). How would you specify a position relative to it ? You can consider anything a medium, but what is actually 'waving' ?
  24. A person who does not take into account the context of a quote, or the time and circumstances when it was made, is an even more stupid person.
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