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05-16-2011, 08:15 PM
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#81
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Moderator Emeritus
Join Date: Dec 2002
Location: Oahu
Posts: 26,860
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Quote:
Originally Posted by Gumby
Why yes. Yes it does. But I thought the other answer was 7
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... for a saturated steam system. (Which I always left off my answers, and which always cost me a minimum of two points.)
I'm surprised no one has brought up "42" yet.
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Co-author (with my daughter) of “Raising Your Money-Savvy Family For Next Generation Financial Independence.”
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05-17-2011, 05:58 AM
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#82
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Thinks s/he gets paid by the post
Join Date: Aug 2006
Posts: 2,433
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Quote:
Originally Posted by nun
Gravity is really a red herring here. Let's consider our universe to be a few of angstroms wide. It's obvious that the EM force between the atoIf we use a model for the hydrogen atom (as many do) that it is a spherical proton (positively charged) surround by a negatively charged spherical shell electron cloud, then by Gauss' Law it follows that outside the spherical shells the electrostatic attraction would be zero since the net charge contained within the spherical shells is zero. Only when the atoms actually penetrate each other would there be any electrostatic forces. The diameter of the atom is about 1 angstrom, so even if they were a few angstroms apart, the atoms would be outside each other's Gaussian surfaces, and, therefore, experience no electrostatic forces.ms is far larger than the gravitational force and than the atoms will sink into a nice cozy potential well. Now as we increase the separation it becomes a question of whether the EM force due to the slight polariztion of the H atoms becomes less than the gravitational force.
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If we use a model for the hydrogen atom (as most do) that it is a spherical proton (positively charged) surrounded by a negatively charged spherical shell electron cloud, then by Gauss' Law it follows that outside the spherical shells the electrostatic attraction would be zero since the net charge contained within their respective Gaussian surfaces (i.e., the spherical shells) is zero. Only when the atoms actually penetrate each other would there be any electrostatic forces. The diameter of the hydrogen atom is about 1 angstrom, so even if they were a few angstroms apart, the atoms would be outside each others Gaussian surfaces, and, therefore, experience no electrostatic forces.
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I'd rather be governed by the first one hundred names in the telephone book than the Harvard faculty - William F. Buckley
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05-18-2011, 08:07 PM
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#83
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Recycles dryer sheets
Join Date: Mar 2011
Posts: 112
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Wait.. is the cat dead? or alive..?
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05-18-2011, 08:29 PM
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#84
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Administrator
Join Date: Apr 2006
Posts: 23,041
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Both
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Living an analog life in the Digital Age.
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05-18-2011, 08:49 PM
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#85
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Thinks s/he gets paid by the post
Join Date: Oct 2010
Location: Waimanalo, HI
Posts: 1,881
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It's unclear.
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Greg (retired in 2010 at age 68, state pension)
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05-19-2011, 07:46 AM
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#86
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2005
Location: Lawn chair in Texas
Posts: 14,183
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Everything is relative to the speed of light through warm tapioca...
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Have Funds, Will Retire
...not doing anything of true substance...
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