On Tue, Dec 27, 2022, 6:47 AM John Clark <[email protected]> wrote:
> On Tue, Dec 27, 2022 at 5:59 AM Jason Resch <[email protected]> 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. 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 [email protected]. > 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 [email protected]. 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.
