Re: Testing the SR Concept of Mutual Time Dilation

valls@xxxxxxxxxxx wrote in news:1184180960.683927.171860
@k79g2000hse.googlegroups.com:

On 11 jul, 10:25, "Sue..." <suzysewns...@xxxxxxxxxxxx> wrote:
On Jul 11, 12:03 pm, v...@xxxxxxxxxxx wrote:
[...]





I regard the paper as "interesting musing" until
proven otherwise. The safer expression is from
the the 1920 paper:

~A speeding bullet can increase the energy
it delivers to a container of water if it can
become hotter, heavier or hastier.~
~relativistic mass~http://www.bartleby.com/173/15.html

The paper is a valiant attempt to avoid tensor
calculus. The use of the kinetic energy of
the electron seems very suspect to me because
it is more likely that the electron is an agent
of inertia, rather than subject to inertia. If they
were subject to inertia, they would fall to the
earth. I know of no evidence that electrons
find our planet attractive.

I am an electronic engineer (among other things). It is the first time
in all my (rather long) life that I find a person putting in doubt
that electrons have mass, and as any mass since
Newton's epoch, with
gravitational and inertial properties.

Have you ever measured the weight of a bottle of
Nitrogen? Helium? Electrons ?

The weight of an entity of mass m is simply mg. We can measure Earth's
gravity acceleration g with great precision, and also the mass of
entities very much difficult than the ones mentioned by you. There
exist just now places in the Earth where the mass of a single NEUTRINE
can be measured (or at least put a maximal value to it).
Any common TV set has electron
cannons.

Cannons? Among the other things you have done,
would one of those things be hunting? If so,
did you find it necessary to connect a +wire
to the game and a -wire to the gun so the
bullet could find its way? In TV sets, electrons
seem to require a bit more coddling to find
their target than inertial behavior would suggest.

Sorry for use the common electronic engineer phrase "electron
cannons". Yes, in your TV set (in the most back part) there exist
"electronic cannons", places where the electrons are emitted and
following 1905 Relativity formulas they hit the screen permitting you
see images in it. Yes, inertial is considered here. Don't know you
that in 1905 Relativity, an inertial system is no more than "a system
of co-ordinates in which the equations of Newtonian mechanics hold
good" (using Einstein's own words)?
As gravitational forces are much more smaller than
electromagnetic ones, the first are normally don't taking into
account, but this doesn't mean that they doesn't exist.

Magnetic forces are weaker than Coulomb forces
and are shorter range. That does not prevent
unification.

Weaker yes, but not shorter range. Yes, they were united by Maxwell in
XIX Century and very much united yet by Einstein with 1905 Relativity.
But what relation has this with our topic?
Sue...
Is that all what you have to comment about my last post? I was waiting
much more!


Actually, the electrons in the beam of electrons from an electron gun can
be weighed. Or, to be more precise, the m/e (mass to charge ratio) can be
determined, and has been determined to rather high accuracy by running the
beam through magnetic and electric fields. This can be done with different
amounts of energy on the electron beam.

Once you have m/e, all you need is e and you can compute m.

This was done over 100 years ago.
http://www.davidparker.com/janine/electron.html

See?




--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@xxxxxxxxxxxxxxxxxxxx remove ch100-5 to avoid spam trap
.

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