Natural Science Forum / Physics / Relativity / June 2005

Come on DHRs, please define an inertial frame.
HW.
www.users.bigpond.com/hewn/index.htm
Sometimes I feel like a complete failure.

We fill a box with a radioactive material which randomly emits
radiation. The box has a shutter, which is opened and immediately
thereafter shut by a clock at a precise time, thereby allowing some
radiation to escape. So the time is already known with precision. We

If neutrinos don't have mass they still have energy.
They are not nothing!
According to GR by their energy they will always effect the gravity of
the universe.

relativity is based on the equivalent principle,
then the developed relativity shows that the equivalent
principle is wrong

Physics is the mathematical study of all conceivable universes. A
universe is a mathematical model that describes spacetime, matter,
energy and their interactions. Think of each model universe as
filling one page in the atlas of all possible universes.

RE: Discussion of Roberts, Carlip, Daryl, Bilge
& Tucker.
This refs to Weinberg's "Grav&Cosmo", pg 148,
"Geodesic Deviation"...

What about the space that's between
you and your computer sceen? Is that distance
not an absolute if there is no movement?
If things are at rest with each other there can

I started a new thread because this is such a busy list and I don't know
if old stuff gets looked at.
So I am having a problem thinking why pi should be "irrational"
I know this is probably basic math but I can't get my head around why an

Dear Colleagues,
Some time ago we published the paper
"On transverse Doppler effect in frames of classical formalism"
http://selftrans.narod.ru/v5_1/contents5rus.html#doppler

I know that I am coming in from the cold, maybe someone will throw me
blanket and make place around the warm fire of knowledge.....
I have recently read about the Life of Einstein, yet, I still do not
understand the special/general laws of relativity and how it impacts on

http://www.pbase.com/scalarp6/image/45314188/original
To Bjoern in particular and other Bjoern level veterans in
in general. Early this year I mentioned Brian Greene talking
about how spaces are turbulent in the microscopic plank realms

[Warning: this message is highly speculative and not
recommended for reading by relativity priests such as
Uncle Al]
What Einstein is showing is that spacetime is always

This is posted in case Mr. Hammond has missed my posts in his
newsreader, although it would be hard to imagine that he has not seen
it. I have posted these questions four times in the How to Avoid
Homicide thread, and then formally in a new thread called The Eickmeier

Hey all,
If velocity change corresponds to rotation in time, could there be 3
time dimensions in which the rotation occurs, one for each spatial
dimension? Time would be sort of a parallel universe then.. Really, is

Hi again,
Is speed of light traveling in a medium constant for all observers?
Thanks.
(I think, space contraction would render the density of the medium