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  1. K

    Today I learned

    Today I learned, that Picasso, after watched the cave paintings said "In 15 thousands years, we have invented nothing" Can't help but remember Aristotle claim. Aristotle: Earth is the center of the universe Early Astronomy: Milky way center is the center of the universe. Hubble (law): Earth...
  2. K

    B One light year distance

    Oh. Thank you :smile:
  3. K

    Today I learned

    Today (yesterday, actually) I learned that YouTube (or Google?) is more scarier than it looks. Just when I'm searching on Google to see what is Appendix F in Challenger disaster report. Then later when I opened my phone, not the computer, Youtube suggested this: Just how the h*ll that they...
  4. K

    B One light year distance

    I'm sorry. 4GB can't be odd number: 4294967295, I think it's 4294967296. It's just the largest value that I remember. I'm a computer programmer myself.
  5. K

    B One light year distance

    Yeah, tell that to the computer seller. For Harddisk and file size. 1 Kb is sometimes 1000 bytes or 1024 bytes. And sometimes 1 Mb is 1000 * 1024 bytes, sometimes it's 1024 * 1024 bytes. For RAM module and flash disk. 1 Kb is exactly 1024 bytes. 1 Mb is exactly 1048576 bytes. And 1 Gb is...
  6. K

    B One light year distance

    Thank you very much for your reply @pbuk
  7. K

    Today I learned

    Add: And the first to carry a civilian.
  8. K

    Today I learned

    Yes, Challenger disaster was very sadly and also traumatic. It's been watch by relatives, all the Christa's students and exploded. Not like Columbia. Which Leroy (the Flight Director) realized something was wrong between 15 minutes of comm black out. And everytime I watch Youtube footage about...
  9. K

    Today I learned

    Ahh, the imperial system. Haven't thought of that. Well, metric was introduced right after Lavoisier lost his head I think.
  10. K

    Today I learned

    Yeah, everytime I see Richard Feynman, I can't shake off @PeterDonis signature. Nature can't be fooled. Challenger investigation?
  11. K

    B One light year distance

    Thanks Ibix
  12. K

    B One light year distance

    Thanks Peter
  13. K

    Today I learned

    Yes, Lavoisier, sadly. La République n'a pas besoin de savants ni de chimistes.
  14. K

    Today I learned

    Today I learned, that the definition of the speed of light is 299,792,458 meter per second. Not that speed of light that I learned. But that the definitions was settled in 1983. What the hell?? Why didn't they set the speed of light is 300,000,000.000000 meter per second exactly, and let the...
  15. K

    B One light year distance

    Dear PF Forum, It's been a while since I logged in here. And I really do appreciate all the answers that I've been getting here. Now, I wonder. Is there any standardization for 1 light year distance? Is it 10 trillion kilometers, or 299,792,458 * 60 * 60 * 24 * 365.256 = ...
  16. K

    Genetic code other than DNA (moved)

    Summary: Curious to find out genetic code other than DNA <mentor> Moved to Discussion, hypothetical discussion Dear PF Forum, It's been a long time since I log into PF. And I hope everybody is in a good health. Recently I had a discussion debate with my friend about other life in this...
  17. K

    B Size of the Big Bang

    Thank you very much @JimJCW
  18. K

    Today I learned

    Today I learned that the Earth was (ever) tidally locked to one of our (Indonesian) satellite? https://en.wikipedia.org/wiki/Garuda_1 Leave it to Lockheed Martin to construct such a powerful satellite. Too bad they don't build F22 anymore after so many were destroyed by Godzilla and Ironman.
  19. K

    Today I learned

    Today I learned, actually a few years ago, as a computer programmer that... You can type. Create Database DataSet Read Text Trace Date Feed all with your left hand. While for me, when I was wearing the cast. popup link lookup loop are the worst.
  20. K

    B Size of the Big Bang

    So..., What was the size of the observable universe at Baryogenesis epoch? And what was its size during Photon (380 thousands years) epoch?
  21. K

    B Size of the Big Bang

    Thanks for all responses. I really appreciate it.
  22. K

    B Size of the Big Bang

    Yess..., the observable universe. I miss that word. I just realized the day after I post this question. Thank you very much.
  23. K

    B Size of the Big Bang

    Dear PF Forum, I've been searching what was the size of the early univese, but I think I might have hit the wall. I read that in the end of inflationary epoch, 10-32 seconds, the size of the universe was as big as a grape fruit? And after that, it seems that I can't find a reference to the size...
  24. K

    Today I learned

    Today I learned, why aliens never visit us. Forget about Fermi paradox, Filter, Goldilocks, etc... When I try to see if there's some discussion about cosmology from an enginner view as opposed to a scientist view (not that I regard Bill Nye is not a scientist). And I type Bill Nye Degrasse...
  25. K

    Today I learned

    Today I learned that LHC costs ten billions dollars! LHC is the biggest machine on Earth to study the smalest thing in the universe?? Phew... Those scientists, they really know how to spend money, eh. :smile:
  26. K

    Today I learned

    Today I learned watched that what "Theory of Everything" means is the combining of the four forces. - Gravity - Electromagnetism - Strong force - Weak Force I mean, I've known this four forces years ago, and I've heard about this TOE, but just yesterday I leaned that it's the combination of the...
  27. K

    U-235 Chain Reaction

    Wow, Sir. You are a real historian.
  28. K

    U-235 Chain Reaction

    Today I learned that U 235 is not a German Uboat
  29. K

    B Power of ten and math power notation

    Ow, thanks SSequence.
  30. K

    B Power of ten and math power notation

    I'm sorry. Penrose number (1010123) question should be Is it A: 1 followed by 246 1230 zeros or B: 1 followed by... you know. I think there's a bug in my ALU or typo (if you call it a typo) in option A, but considering option B, my ALU just simply crashes.
  31. K

    B Power of ten and math power notation

    Dear PF Forum, I watched this video 10 ^ 10 ^ 10 ^ 5600 The narative says, It is 1 followed by 5600 zeros But that's not what I think, I think it is 1 followed by I don't know. What does this number means? Is it A: 10 ^ (10 ^ (10 ^ 56))) or B: ((10 ^ 10) ^ 10) ^ 56? It says that "As...
  32. K

    B Question about quantum entanglement

    I think I have one other question (many actually, but it's the only one that I can think of). When Alice measure her electron it spins up. What happens when Alice measure her electron again some times later? Considering that Bob does not do anything, and nobody tampering with Alice electron...
  33. K

    B Question about quantum entanglement

    Thank you, thank you very much Perok
  34. K

    B Question about quantum entanglement

    Dear PF Forum, I've been having this question for a long time. I want to know how or what is measurement. Supposed there are two observers. Alice and Bob, They are separated 10 light minutes away. They are in the same frame of reference, meaning that their distance is the same all the time...
  35. K

    B Sun powered by quantum tunneling - question

    I think this is after the OP question. Because I just watch this video and looking explanation in PF Forum.
  36. K

    B Question about Primary Colors -- Why Red-Green-Blue?

    Now, now. It would be 300000000/0.000000590 = 508 Thz :smile:, not 590nm But, I understand your answer Thank you sir :smile:
  37. K

    B Question about Primary Colors -- Why Red-Green-Blue?

    Dear PF Forum, My friend asked me this afternoon, why primary colors are Red, Green, Blue. Well, I just answered it's because our receptor cells in the retina. The L,S,M. But something is bothering me now. Does our brain "translate" the color from our retina? Supposed we see two lights from red...
  38. K

    Random Thoughts part 6

    I recently watch Genius on NatGeo, It's season 1: Einstein. I think I spot a few mistakes there. 1. When this astronomer, Freudlund, if I spell correctly, says "The orbit of Mercury is not like the orbit of seven other planets" Now, Pluto is not a planet since 2006 if I'm not mistaken. Since...
  39. K

    Finding Large Prime Numbers

    Thank you very much every body.
  40. K

    Finding Large Prime Numbers

    Thanks Baluncore, it's the certifying that I'm trying to find out.
  41. K

    Finding Large Prime Numbers

    Wow, thank you. I'll check it.
  42. K

    Finding Large Prime Numbers

    Dear PF Forum, Can someone help me with the algorithm for finding a very large prime number? In RSA Encryption (1024 bit? 2048?, I forget, should look it up at wiki for that), Private Keys is a - two prime number packet. Now, what I wonder is, what algorithm that the computer use to find those...
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