Amongst the many other difficulties I have with cosmological speculations I am still trying to imagine what is on the other side of the boundary of this hypothetical spherical, expanding, universe... Perhaps there are some more atoms over there on which to store some more primes?
I also have difficulty convincing my self that whilst you can't get something from nothing that you can get everything from nothing, including time itself, at some point in time way back. The best I can do is to keep repeating the mantra and hope that I can believe it one day :-). On Fri, Apr 24, 2009 at 3:22 AM, bill lam <[email protected]> wrote: > I think that's an underestimate, the speed of light is constant but it > was much faster when the big bang just started if there was one > (obviously not verified). > > On Thu, 23 Apr 2009, Roger Hui wrote: >> The radius of the universe in meters is: >> 15e9 years * 365.2425 days/year * 24 hours/day * >> 3600 seconds/hour * 3e8 meters/second >> >> ] r=: */ 15e9 365.2425 3600 24 3e8 >> 1.42006e26 >> >> Its volume in cubic meters is: >> o. 4r3 * r^3 >> 1.19953e79 >> >> The minimum size of an atom is a Bohr radius sphere: >> o. 4r3 * 5.3e_11 ^ 3 >> 6.23615e_31 >> >> The number of atoms is therefore bounded by the >> former divided by the latter: >> (o. 4r3 * r^3) % (o. 4r3 * 5.3e_11^3) >> 1.92351e109 >> >> That is, if the entire universe is packed with atoms, >> there'd be no more than 2e109 of them. >> >> >> >> ----- Original Message ----- >> From: [email protected] >> Date: Thursday, April 23, 2009 13:59 >> Subject: Re: [Jprogramming] table of primes to 1,000,000,000 or more >> To: Programming forum <[email protected]> >> >> > I believe the estimate of 10^100 atoms is actually hydrogen >> > atoms. >> > >> > Anyhow, I got my estimate from wikipedia.com. >> > >> > >> > ----- Original Message Follows ----- >> > From: Zsbán Ambrus <[email protected]> >> > To: Programming forum <[email protected]> >> > Subject: Re: [Jprogramming] table of primes to 1,000,000,000 >> > or more >> > Date: Sun, 19 Apr 2009 11:29:10 +0200 >> > >> > >On Sat, Apr 18, 2009 at 10:10 PM, >> > >> <[email protected]> wrote: If there are ~ >> > >10^100 atoms in the universe, >> > > >> > >I think that's an underestimate, there are actually between >> > >10^200 and 10^300 atoms in the universe I believe. >> > > >> > >Ambrus >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > -- > regards, > ==================================================== > GPG key 1024D/4434BAB3 2008-08-24 > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 > 唐��015 王�S 青�G > 言入�S花川 每逐青�G水 �S山�⑷f�D 趣途�o百里 ��喧�y石中 色�o深松�e > 漾漾��菱荇 澄澄映葭�� 我心素已�f 清川澹如此 ��留�P石上 垂���⒁岩� > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- http://www.ixquick.com/ Ixquick Protects Your Privacy! The only search engine that does not record your IP address. http://www.vivapalestina.org/
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