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Unified force

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Y

unread,
Nov 21, 2012, 8:20:07 PM11/21/12
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What could be so hard about unifying the forces ?

An electron orbits a nucleus, the Earth orbits the Sun. Surely
whatever causes these orbits is the same thing ?

-y

Big Dog

unread,
Nov 23, 2012, 9:28:16 AM11/23/12
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Calculate the strength. Or more importantly, see what the size of the
electron's orbit around the nucleus would be if it were gravitationally
bound to the nucleus.

Numbers do tell you important things. Without them, you understand little.

Big Dog

unread,
Nov 23, 2012, 3:34:50 PM11/23/12
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Another way of prodding your thinking on this:
If you look in any basics physics book, you'll see some categorization
of all fundamental interactions like this:
- electromagnetic
- gravitational
- weak nuclear force
- strong nuclear force

So the obvious question is, where did these categorizations come from?
The ones that were known first were gravity and electromagnetism. When
nuclear interactions were studied, whatever gave people the idea that
there must be at least one more that is distinctly different than either
electromagnetism or gravity? A little diving even in oversimplified web
articles will give you a little insight, depending on your skill with a
search engine. (If you're not skilled with a search engine, then using
the web is pointless and a large waste of time, as you will not easily
find what you're looking for, and you'll come to the erroneous
conclusion that the answer is not there. If you're like this, then a
book is a much better approach.)

Big Dog

unread,
Nov 23, 2012, 3:39:16 PM11/23/12
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On 11/21/2012 7:20 PM, Y wrote:
If you're lazy about looking things up and would rather just think about
things, then here's something to consider:

What do you know about the charges on two objects that attract each
other electrostatically? They're oppositely charged, right? (electron
and proton, for example)

OK, suppose you have three objects, A, B, and C.
Suppose you observe that A and B attract each other. Suppose you also
observe that A and C attract each other. Then what can you reliably
predict about the behavior of B and C with respect to each other?

Now, ask yourself if this is the behavior observed in gravitational systems.

Y

unread,
Nov 23, 2012, 5:35:45 PM11/23/12
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I have. A hydrogen atom's nucleus, electron and bohr radius is
scaleable to the sun, earth and orbit respectively.

-y

Y

unread,
Nov 23, 2012, 5:45:57 PM11/23/12
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It's all just little spheres of stuff spinning about. This would even
be the case for charge. The fields might be different, but the motion
is the same.

-y

Big Dog

unread,
Nov 23, 2012, 5:50:05 PM11/23/12
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You haven't done the calculation asked for.
Using the mass of the sun, you can CALCULATE the radius of the earth's
period, knowing its period. This comes from using the force of gravity
and Newton's second law.

F=ma
The left side is GMm/r^2, where M is mass of sun, m is mass of earth,
and r is radius of orbit.
The right side is mv^2/r = m(2pi*r/T)^2/r, where T is the period of the
orbit and m and r are as before.
Setting these two equal to each other,
GM/r^2 = 4*pi^2*r/T^2
or GMT^2/4*pi^2 = r^3.
Go ahead and do this calculation. You'll need to google the values of G,
M, and T and then compare the resulting r with what you can also google.

Now do this same calculation with M being the mass of the proton and T
being the classical period of the electron, which you'll have to google.
Compare the r you get with the Bohr radius.

Big Dog

unread,
Nov 23, 2012, 5:57:34 PM11/23/12
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Oh dear. I see this simple case confused you.

Here, let me help you.

You know that opposite charges attract and like charges repel, right?

OK, if A and B attract each other, then you know A and B have opposite
charges, right?

If A and C attract each other, then you know A and C have opposite
charges, right?

OK, so since B and C both have charges opposite to A, then you know they
must have like charges, right? So what happens to like charges?

Have you ever seen a gravitational system of three objects behave that
way (say, Sun, earth, moon)?

space...@gmail.com

unread,
Nov 23, 2012, 6:03:31 PM11/23/12
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To the title: light is a dual force...

Mitchell Raemsch

Paul Cardinale

unread,
Nov 26, 2012, 4:18:36 PM11/26/12
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So your 'logic' is: "If A causes B, and C causes D, and if B is
similar to D, then it must be that A and C are the same thing."

Y

unread,
Nov 26, 2012, 7:00:55 PM11/26/12
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A magnet curves spacetime.

yep.

-y
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