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SergUpstart

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Everything posted by SergUpstart

  1. Scientists have discovered that a distant neutron star has released as much energy as our Sun produces in 100 thousand years in just 0.16 seconds, writes Scientific American.
  2. Artificial intelligence in one of the district people's prosecutor's offices in Shanghai for the first time became the compiler of the text of the indictment, which will be presented to the criminal in court. This is reported by Economic News with reference to haggin.az According to the South China Morning Post newspaper, AI received prosecutorial skills after studying more than 17 thousand cases considered in the courts of Shanghai from 2015 to 2020. The "digital prosecutor" makes accusations with 97% accuracy, based on one thousand "characteristic features" that he identifies in court documents on specific criminal cases. "Artificial intelligence to a certain extent can replace prosecutors in the decision-making process, as well as assist them in drafting indictments, which will reduce their daily workload and enable prosecutors to focus on more important cases," the publication notes. According to the newspaper, the "digital prosecutor" is initially able to bring charges for eight of the most common crimes in Shanghai, such as credit card fraud, gambling, dangerous driving, intentional injury, obstructing authorities in the performance of official duties, theft, fraud. Scientists are confident that in the future AI will be able to bring charges for more high-profile crimes.
  3. Scientists at the Massachusetts Institute of Technology, Cardiff and Cambridge Universities have figured out what chemical reactions could make the clouds of Venus habitable. The fact is that ammonia found in the atmosphere of the planet in the 1970s is able to neutralize drops of sulfuric acid, writes MIT News. https://news.mit.edu/2021/habitable-venus-clouds-acid-neutralizing-1220 And then there could be biological species similar to terrestrial ones. The scientists explained that ammonia turns acid into ammonium sulfite, which in itself can create an environment in the clouds of Venus suitable for life. Scientists were prompted to conduct a study by mysterious anomalies in the clouds of Venus – such as small concentrations of oxygen, which should not be there.
  4. CNN: US authorities are preparing to evacuate citizens from Ukraine in the event of a Russian invasion https://www.cnn.com/2021/12/07/politics/us-citizens-evacuation-ukraine/index.html
  5. The majority of the population of Taiwan does not want Taiwan to join China, but the majority of the inhabitants of Crimea wanted to join Russia. The movement of Russian troops near the borders of Ukraine is pressure on Ukraine not to launch an offensive on Donetsk and Lugansk.
  6. The military budget consists of expenses for the maintenance of military personnel, expenses for the purchase of weapons and other purchases not related to weapons. If the cost of maintaining personnel increases, it is at the expense of other expenses.
  7. Russia has approved the defense budget for 2021-2023 — it was reduced by 10%. Despite this, it guarantees the combat readiness and development of the country's Armed Forces. Deputy Minister of Defense of the Russian Federation Tatyana Shevtsova told the newspaper Krasnaya Zvezda about this. https://360tv.ru/news/army/rossija-sokratila-bjudzhet/ At the same time, military salaries have been increased in Russia, so the cost of purchasing weapons will be reduced even more.
  8. And if Aliyev and Erdogan also seize Armenia Earlier, Aliyev had already stated that Yerevan belongs to Azerbaijan
  9. It seems to me that a more important physical constant is 4 *Pi*G*epsilon0, which shows how many times stronger bodies with masses of 1 kg interact gravitationally stronger than two charges of 1 Coulomb at the same distance. The dimension of this constant is Сoulomb^2/kg^2 that is, it does not depend on the distance scale.
  10. In 2014, Putin could have seized the whole of Ukraine, but limited himself to Crimea. Putin only needs the opportunity to export gas to Europe. He can send troops into Ukraine only in response to Ukraine's actions, which may be the offensive of Ukrainian troops on Donetsk or the blockade of Tiraspol.
  11. Even an ideal flywheel will lose energy if you take it away from it. So you won't get unlimited energy. And if you mean storing energy for an unlimited time, then a superconducting ring with a current or a vacuum capacitor is better.
  12. The movement towards authoritarianism is a global trend. Xi Jinping, Putin, Lukashenko, Erdogan, Aliyev, Maduro...
  13. The sensitivity of the human eye allows detecting a stream of 100 photons, but the frog's eye can detect even single photons. Therefore, if you move away from the glowing flashlight in the void and darkness, a person at some distance will stop seeing the flashlight. But the frog will always see the flashlight, but from a certain distance the light of the flashlight will blink and the frequency of blinking will decrease with increasing distance. http://fian-inform.ru/priborostroenie/item/518-eye-frog
  14. While the particle is spreading, it is a wave, but at the moment of absorption it becomes a corpuscle. Isn't it?
  15. Actually, the question was asked to the author of the previous topic, who was trying to find a classical explanation for the results of the experiment with electron diffraction at two slits. And it was set to show that it is impossible to find classical explanations for quantum effects.
  16. And can you explain the results of the Stern Gerlach experiment, which showed that the spin of a charged particle can have only two values, plus or minus 1/2????
  17. Matter and energy arise and disappear constantly in accordance with the Heisenberg uncertainty principle. So the origin of the universe is most likely a quantum effect. God is not needed for this.
  18. Yes, and after BB, the universe rises in a gravitational well. This means that the red shift in the spectra of galaxies has not only a Doppler component, but also a gravitational one.
  19. As Hawking said, God is not needed to explain the origin of the Universe, God is superfluous.
  20. Sure. If we take the above formula g=C^2/r, then it gives only the module g, but g is a vector.
  21. Although I see an error in the above quote, near a more massive body, r will be smaller, not larger.
  22. The radius of curvature of spacetime is a quantity inversely proportional to the scalar curvature of spacetime. It has the dimension of length. For weak gravity there is an approximate formula r=c^2/g The graphic shows a projection of the path followed by a falling object in four-dimensional spacetime into three-dimensional space. Objects fall because they follow geodesics in this spacetime. They are of maximal length, maximizing proper time. For all trajectories, the initial angle or speed does not matter and the curvature is the same, . Near a very massive object such as a black hole, this value is considerably greater. https://demonstrations.wolfram.com/SpacetimeCurvatureForAFallingObjectNearTheEarthsSurface/
  23. @Marcus Hanke said "So visual appearance in curved spacetime does depend on the observer, because different events are linked by different sets of null geodesics." Exactly. The acceleration of gravity is related to the radius of curvature of spacetime by the approximate formula r = c^2/g or g=c^2/r In the reference frame of a remote observer, the radius of curvature of spacetime increases by k times, as do all distances, and, accordingly, the acceleration of gravity decreases by k times, as mentioned above.
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