Am Di, 27. Dez 2022, um 15:11, schrieb Jason Resch: > > > On Tue, Dec 27, 2022, 6:47 AM John Clark <johnkcl...@gmail.com> wrote: >> On Tue, Dec 27, 2022 at 5:59 AM Jason Resch <jasonre...@gmail.com> wrote: >> >>> *> There's an interesting relationship between the strength of the >>> electrostatic repulsion between two protons, and the gravitational >>> attraction of protons. It works out such that it takes ~10^54 protons >>> gathered together in one place before the gravitational attraction can >>> overwhelm the electrostatic repulsion. In other words, stars as as big and >>> long-lived as they are because gravity is so weak.* >> >> That's true, and one of the biggest mysteries in physics is why gravity is >> so weak, after all the strong nuclear force can keep 100 or even 2 protons >> in one place. The only explanation I've heard is the hypothesis that there >> are other spatial dimensions besides the 3 that we're familiar with, string >> theory claims there are at least 9, but that all the forces of nature EXCEPT >> for gravity are confined to just 3 dimensions so they generally follow the >> law that says they decrease with distance according to the well known 1/r^2 >> rule, but gravity is free to radiate into all 9 dimensions so it decreases >> with distance according to a 1/r^8 rule; and the reason we don't see gravity >> behave this way in our everyday life is it the other 6 dimensions are curled >> up very tightly so the effect becomes apparent only at the ultra microscopic >> scale. It's a nice theory but there's not a scrap of experimental evidence >> to support it. > > > That's interesting I hadn't heard that detailed of an explanation before. > > There are also anthropic arguments for very weak gravity: > > If gravity were 10 times stronger than it is, stars like our sun would live > for 1 billion years, not 10 billion. > > Yey it took multiple billions of years to evolve multicellular life.
Interesting stuff Jason and John. I tend to go with anthropic explanations by default (because I cannot think of anything else). So much of our physical laws seem so precisely fine tuned for life that I struggle to come up with any other explanation. I seem to remember that Brent has a different view on this? Telmo > Jason > > >> >> John K Clark See what's on my new list at Extropolis >> <https://groups.google.com/g/extropolis> >> hfl >> >>> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Everything List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to everything-list+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/everything-list/CAJPayv2jR%2BUcPiSviVfghHmpzN7NN_yNURGiBKNcQvjYaD7y7g%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/everything-list/CAJPayv2jR%2BUcPiSviVfghHmpzN7NN_yNURGiBKNcQvjYaD7y7g%40mail.gmail.com?utm_medium=email&utm_source=footer>. > > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to everything-list+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CA%2BBCJUgoesGmGwmOY6p6K%3DKsFirXR%3Da6AOYsYzy%2BzZJ70aSc%2BA%40mail.gmail.com > > <https://groups.google.com/d/msgid/everything-list/CA%2BBCJUgoesGmGwmOY6p6K%3DKsFirXR%3Da6AOYsYzy%2BzZJ70aSc%2BA%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/bcb5b562-74bc-420b-97d5-105d9a5d6077%40app.fastmail.com.
