Natural Science Forum / Physics / Relativity / November 2008

How does the dimensions of a spinning ring change wrt its angular
velocity?
I would have thought it should Lorentz contracting along its
circumference, yet this would also imply a smaller radius, even though

From:
http://en.wikipedia.org/wiki/Aether_theories
"
Aether and general relativity

The relativistic Doppler effect:
f_observed=f_source (1-v/c*cos(theta))/sqrt(1-(v/c)^2)
shows that f_observed=f_source for cos(theta)=(1-sqrt(1-(v/c)^2))/(v/
c)

The earlier thread was getting too long and turning as well into an
pissing contest as well.  So, I will continue with a new draft on a new
thread.
Charles Francis at SPF pointed out that there was an error in my use of

I want perturb the existence of uncritical GR students and geometrically
oriented guys with this provocative post :-)
The analysis on the geometrical formulation of gravity done in recent
years by several groups in the world has demonstrated that General

Dear Ken,
For weeks now you have been telling me, as we discuss elementary
problems in Specialk Relativiy, that I have been executing the Lorentz
Transformation incorrectly.

Consider a large and stable clock (C1) in space, connected to a very long and
accurately calibrated rod.  At precise intervals of one defined time unit, the
clock emits a brief pulse of light, encoded with its time reading.
Alongside the rod is a stationary observer with another ...

If light is emitted at the origins of frames of reference S and
S' when they coincide with S' moving with velocity v relative to S
according to the transformation equations
                      x'=x-vt

Please excuse the possible stupidity of the question. I am a newbie to
relativity. My question is fairly simple:
A traveler covers the distance between Alpha Centauri and Earth in 120 seconds
(actual distance is ~4.4 light years). I would like to know:

Tommaso Dorico, a famous particle physics experimentalist,
thinks that to be smarter than a theoretical physicist is
possible and necessary,
http://qd.typepad.com/6/2005/03/be_smarter_than.html

I"ve heard that "energy conservation fails in GR" and perhaps this is
an example of it.
Gravity waves travel through vacuum, where by definition T = 0 : no
energy or momentum flux.

http://www.geocities.com/albertzotkin/usenet_talk.html
enjoy :-)

"Can the Second Law of Thermodynamics Be Circumvented?"
    (See also our sister website reticsessays.com)
    The validity of the First and Second Laws of Thermodynamics seems to be
beyond question. Under the first law, the total energy content of a closed

One no imagine story about " The third Newton's law ".
=========..
" The action is equal to counteraction." was the great scientific
discover.

SPF = Sci.Physics.Foundations.
Hi Charles and Kwan.
As a member of SPF I give the *benefit of the doubt*
to new ideas, such as Kwan's, and your's too Charles.