Editing Talk:2100: Models of the Atom
Please sign your posts with ~~~~ |
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 9: | Line 9: | ||
:We seem to be missing the {{w|Acorn Atom}} as well. [[User:Kazzie|Kazzie]] ([[User talk:Kazzie|talk]]) 10:16, 18 January 2019 (UTC) | :We seem to be missing the {{w|Acorn Atom}} as well. [[User:Kazzie|Kazzie]] ([[User talk:Kazzie|talk]]) 10:16, 18 January 2019 (UTC) | ||
− | + | According to [[https://www.ast.cam.ac.uk/~trentham/cosmology/lec6.pdf|cosmology lecture notes by the astronomer Neil Trentham]], mass in the universe ist 75% H (mostly 1p+0n=1) and 25% He (mostly 2p+2n=4). As He is 4 times as heavy and 3 times as seldom, there is 12 times more H than He => The ratio n/p is 1/7. | |
− | |||
− | According to [https://www.ast.cam.ac.uk/~trentham/cosmology/lec6.pdf cosmology lecture notes by the astronomer Neil Trentham], mass in the universe ist 75% H (mostly 1p+0n=1) and 25% He (mostly 2p+2n=4). As He is 4 times as heavy and 3 times as seldom, there is 12 times more H than He => The ratio n/p is 1/7. | ||
We can assume that in the 538 model the statistics was done on atoms comprising few Hydrogene, e.g. only the earth's mantle. In heavier elements the ratio n/p > 1. Sebastian --[[Special:Contributions/172.68.110.70|172.68.110.70]] 07:39, 18 January 2019 (UTC) | We can assume that in the 538 model the statistics was done on atoms comprising few Hydrogene, e.g. only the earth's mantle. In heavier elements the ratio n/p > 1. Sebastian --[[Special:Contributions/172.68.110.70|172.68.110.70]] 07:39, 18 January 2019 (UTC) | ||
Line 17: | Line 15: | ||
: It reminds me of the mass of the top quark (<s>even though the current best value is 172.44 GeV</s>, 173, as measured at the time at Tevatron, was used as a good approximation for a long time. The latest Particle Data Group review also gives something rounding to 173) [[Special:Contributions/141.101.107.174|141.101.107.174]] 13:55, 18 January 2019 (UTC) | : It reminds me of the mass of the top quark (<s>even though the current best value is 172.44 GeV</s>, 173, as measured at the time at Tevatron, was used as a good approximation for a long time. The latest Particle Data Group review also gives something rounding to 173) [[Special:Contributions/141.101.107.174|141.101.107.174]] 13:55, 18 January 2019 (UTC) | ||
:Do they really need a table for explanation? wouldn't a simple list be much easier to read? in my POV (which AFAIK is shared by many here) a table with just 2 columns is not useful at all --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 14:17, 18 January 2019 (UTC) | :Do they really need a table for explanation? wouldn't a simple list be much easier to read? in my POV (which AFAIK is shared by many here) a table with just 2 columns is not useful at all --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 14:17, 18 January 2019 (UTC) | ||
− | |||
− | |||
− | |||
− | |||
− | |||
The tiny bird model puzzles me completely. Is it a reference to any interim (even if obscure) scientific model or is it a completely facetious Randall's invention? Or is it a reference to something unrelated? Any ideas? -- [[Special:Contributions/162.158.92.34|162.158.92.34]] 12:55, 18 January 2019 (UTC) | The tiny bird model puzzles me completely. Is it a reference to any interim (even if obscure) scientific model or is it a completely facetious Randall's invention? Or is it a reference to something unrelated? Any ideas? -- [[Special:Contributions/162.158.92.34|162.158.92.34]] 12:55, 18 January 2019 (UTC) | ||
− | |||
− | |||
− | |||
The absolute scale of physical constants seldom has specific meaning. See h vs ħ (h bar). Neither is right or wrong and they can be used interchangeably (when putting the 2*pi in or removing it at the same time). The same is true for dimensionless constants. E.g. 4*pi *(h bar) = 2 *(h). So the 4*pi as dimensionless constant is as correct as 2 or any other dimensionless number, as you can rescale other constants. If you redefine some natural constants, the value 137 also changes. Most dimensionless constants can be deduced from mathematics with a known or yet unknown underlying physical theory. For example all chemical properties of elements (=chemical constants) can be calculated from the underlying physics by very complex mathematical terms. For an excursion that also mathematical constants are open for debate, see the [[1292: Pi vs. Tau|Pi vs Tau]] debate. Both are correct. Sebastian --[[Special:Contributions/172.68.110.46|172.68.110.46]] 15:16, 18 January 2019 (UTC) | The absolute scale of physical constants seldom has specific meaning. See h vs ħ (h bar). Neither is right or wrong and they can be used interchangeably (when putting the 2*pi in or removing it at the same time). The same is true for dimensionless constants. E.g. 4*pi *(h bar) = 2 *(h). So the 4*pi as dimensionless constant is as correct as 2 or any other dimensionless number, as you can rescale other constants. If you redefine some natural constants, the value 137 also changes. Most dimensionless constants can be deduced from mathematics with a known or yet unknown underlying physical theory. For example all chemical properties of elements (=chemical constants) can be calculated from the underlying physics by very complex mathematical terms. For an excursion that also mathematical constants are open for debate, see the [[1292: Pi vs. Tau|Pi vs Tau]] debate. Both are correct. Sebastian --[[Special:Contributions/172.68.110.46|172.68.110.46]] 15:16, 18 January 2019 (UTC) | ||
Any chance the 4i is a Four-eye Joke? Seems a little low brow amongst all the numbers with meaning, but maybe? Also, the square root of 2 goes back a long way in mathematical theory like the first proof that not all numbers are rational. [[User:Pevinsghost|Pevinsghost]] ([[User talk:Pevinsghost|talk]]) 15:30, 18 January 2019 (UTC) | Any chance the 4i is a Four-eye Joke? Seems a little low brow amongst all the numbers with meaning, but maybe? Also, the square root of 2 goes back a long way in mathematical theory like the first proof that not all numbers are rational. [[User:Pevinsghost|Pevinsghost]] ([[User talk:Pevinsghost|talk]]) 15:30, 18 January 2019 (UTC) | ||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− |