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granpa

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Everything posted by granpa

  1. Phonons have particle like properties too
  2. What does a phonon do that a neutrino can't?
  3. Before it will hold hydrogen it will hold water. Then its no longer a rocky surface
  4. Neptunes "atmosphere" is liquid hydrogen and liquid helium
  5. At room temp you obviously need at least 1000 bar to get liquid density. As for heat, thats why I pointed out that its transparent
  6. If all the hydrogen becomes metallic then the atmosphere would be almost entirely liquid helium which is completely transparent to infrared (because its monatomic)
  7. Empirically speaking: Either et's exist or they don't so the a priori probability is 0.5 = 50% This just means "we dont know one way or the other". By Bayes Theorem: Probability that ets exist given that we observe that life arose very early on earth = 0.5*probability that we observe that life arose very early on earth given that et's exist/probability that we observe that life arose very early on earth
  8. Not the probability that life exists on Earth. The probability that we observe life on Earth That probability is of course 1
  9. Bayesian probability does though
  10. Something is empirical if it conforms to observation. Something is rational if it conforms to the laws of cause and effect Question: What is an example of something that is rational but not empirical? Answer: Et's Empirically speaking: Either et's exist or they don't so the a priori probability is 0.5 = 50% This just means "we dont know one way or the other". The only empirical evidence that et's exist that I have ever heard anyone claim is that we observe life here on earth therefore et's are likely to exist. By Bayes Theorem: Probability that ets exist given that we observe life on earth = 0.5*probability that we observe life on earth given that et's exist/probability that we observe life on earth 0.5*1/1 = 0.5 The probability is completely unchanged by the observation that life exists here on earth. Empirically speaking, We still dont know one way or the other. However rationally speaking we know that the laws of cause and effect have allowed life to exist here on Earth and those same laws apply everywhere throughout the Universe. Given the vast size of the universe it is most rational to believe that these exist
  11. It means it was likely to arise by chance
  12. It means it could have arisen by chance
  13. the arrangment of bases was chance
  14. it was chance A typical tRNA has 75 bases. 2^75 = 3.77 * 10^22 1 mole of tRNA would weigh 25 kg and contain 6 * 10^23 molecules
  15. https://en.wikipedia.org/wiki/RNA_world
  16. It wasnt a cell. It was a stack of plate-like molecules. A 1 dimensional liquid crystal that later became a molecule which evolved into rna It formed by chance To be considered alive it must reproduce and evolve (or be the product of something that reproduced and evolved)
  17. Life emerged from lifelessness https://en.wikipedia.org/wiki/Emergence In philosophy, systems theory, science, and art, emergence is a process whereby larger entities, patterns, and regularities arise through interactions among smaller or simpler entities that themselves do not exhibit such properties. Emergence is central in theories of integrative levels and of complex systems. For instance, the phenomenon of life as studied in biology is an emergent property of chemistry and psychological phenomena emerge from the neurobiological phenomena of living things. Likewise, economic and legal phenomena emerge from psychology.
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