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Re: [Phys-L] A crazy planetary system (AFTER CORRECTING AN ERROR)

Yes, indeed. Donald's expectation, based on formulas 3 and 1, was confirmed. I increased G by 30 orders of magnitude (from 6.67*10-11 to 6.67*10^+19) and the parameters for the "gravitational atom" became:

r1=2*10^-14 m (about 20 Fermi)


v1=2.5*10^6 m/s (close to 1% of c).

Can the "what if" exercises be pedagogically useful? Yes, they can.


On Dec 28, 2012, at 1:16 PM, Donald Polvani wrote:

I've looked at your web page and believe your equations and calculations are
correct. The reason for the very large radius and slow speed you obtain
(compared to what we normally compute for the hydrogen atom using similar
equations) is due to your use of the gravitational rather than the
electromagnetic force. The much greater strength of the electromagnetic
force between a proton and electron leads to the much smaller Bohr radii and
much more rapid Bohr electron speeds we are familiar with. If atoms'
properties were determined by gravitational rather than electromagnetic
forces, their radii and electron speeds would make your results look much
more reasonable.

Dr. Donald G. Polvani
Adjunct Faculty, Physics
Anne Arundel Community College

-----Original Message-----
From: Phys-l [] On Behalf Of Ludwik Kowalski
Sent: Thursday, December 27, 2012 8:57 PM
Subject: [Phys-L] A crazy planetary system (AFTER CORRECTING AN ERROR)

Unable to attach the file (describing my problem) I put its content into a
webpage. The link is:

Comments will be appreciated.



On Dec 27, 2012, at 7:23 PM, Ludwik Kowalski wrote:

I am puzzled by the result of a trivial calculation, as described in the
attached file. Comments will be appreciated.

Ludwik Kowalski


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