[geocentrism] Re: More combined post responses
- From: "Dr. Neville Jones" <ntj005@xxxxxxxxxxx>
- To: geocentrism@xxxxxxxxxxxxx
- Date: Sun, 17 Oct 2004 23:34:54 +0100 (BST)
Mike wrote,
"The law of conservation of angular momentum applies to everything in any
closed system. Remember that momentum (angular or rectilinear) is proportional
to mas and velocity. If you impart a certain momentum on a
molecule of a fluid it has very little mass and will have a correspondingly
high velocity. If that molecule is part of a rigid body then the mass of the
object moved is much greater and the velocity therefore much less. In both
cases the momentum is the same. ,,, The single molecule is just a very small
rigid body ..."
No. The law of the conservation of angular momentum applies to rigid bodies.
You cannot circumvent this by claiming that a molecule is a rigid body and
therefore a liquid or gaseous collection of molecules is also a rigid body.
That is not what angular momentum is all about.
Furthermore, you keep referring to a "closed system," as if the World and its
atmosphere were somehow encapsulated in something. In the real universe, there
is no such thing as a vacuum. Hence space is not a vacuum either. There exists
electromagnetic radiation, debris, gravity, ...
Angular and linear momentum might depend on mass and velocity, but so too does
kinetic energy. The law of the conservation of energy states that energy can
neither be created nor destroyed and the "closed system" that that refers to is
the entire physical universe. Hence, the interaction of a rotating World with
an atmosphere is always going to be a case of losing angular momentum (i.e.,
angular velocity, since the mass of the World does not change) to the
atmosphere, because of friction. Friction generates heat. Heat gets dissipated.
Some of this dissipated heat will leave the World/atmosphere system in the form
of radiated energy. The World will slow down and stop.
The law of the conservation of energy is seen to be satisfied. The law of the
conservation of angular momentum is irrelevant to the World/atmosphere system,
but is also satisfied within the universe as a whole.
I hope that this finally clarrifies this point.
Neville.
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