Sujet : Re: energy and mass
De : ttt_heg (at) *nospam* web.de (Thomas Heger)
Groupes : sci.physics.relativity sci.electronics.designDate : 01. Mar 2026, 10:46:49
Autres entêtes
Message-ID : <n0ifoiFjoihU3@mid.individual.net>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
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Am Samstag000028, 28.02.2026 um 15:51 schrieb Ross Finlayson:
On 02/28/2026 01:14 AM, Thomas Heger wrote:
Am Donnerstag000026, 26.02.2026 um 15:41 schrieb Ross Finlayson:
On 02/26/2026 06:32 AM, Maciej Woźniak wrote:
On 2/26/2026 3:05 PM, Ross Finlayson wrote:
On 02/26/2026 02:21 AM, J. J. Lodder wrote:
Bill Sloman <bill.sloman@ieee.org> wrote:
>
On 25/02/2026 9:46 pm, J. J. Lodder wrote:
Bill Sloman <bill.sloman@ieee.org> wrote:
>
On 25/02/2026 4:02 am, Ross Finlayson wrote:
On 02/24/2026 03:40 AM, J. J. Lodder wrote:
Ross Finlayson <ross.a.finlayson@gmail.com> wrote:
>
On 02/23/2026 12:49 PM, J. J. Lodder wrote:
Ross Finlayson <ross.a.finlayson@gmail.com> wrote:
>
What, you thought Boltzmann constant was a
purely physical constant?
>
https://en.wikipedia.org/wiki/Boltzmann_constant
>
As of the latest revision of the SI, Boltzmann's constant
is just another conversion factor between units.
>
There is no longer any physical content to it,
>
Jan
>
>
The Boltzmann constant is provided to you in a little table.
>
Another table tells me that there are 5280 feet to the mile,
>
Jan
>
>
Boltzmann constant is in the little leaflet in
every book on thermodynamics.
>
Often it's the only "physical constant" given.
>
The SI units are much separated from the relevant
empirical domains these days.
>
For example, "defining" the second as about the
cesium atom its hyperfine transition, and "defining"
the meter as that according to the "defined" speed
of light, results all that's defined not derived,
the System Internationale units that we all know
and love simply don't say much about the objective
reality of the quantities.
>
Nothing that you have the wit to understand?
The are a lot of steps between the optical spectrum of a cloud of
cesium
atoms and the frequency of an oscillator running slowly enough for
you
to be able to count transitions, but there is no question about the
objective reality of every last one of them.
>
Eh, the basis for the SI is the defined value
for a -microwave- frequency of the Cesium atom.
From an engineering point of view a Cesium clock
is nothing but a stabilised quartz clock.
>
That "nothing but" ignores the fact that the output of the cesium
clock
has a much more stable frequency than the outputs of regular quartz
clocks. That's why people pay more money for them.
>
Of course, it is a stibilised quartz clock.
I thought you were proud of being an engineer,
so I adapted the description.
>
Optical frequency standards do exist,
such as Strontium lattice 'clocks' for example,
but so far they are frequecy standards only,
not yet clocks.
>
https://en.wikipedia.org/wiki/Optical_lattice_clock
>
Like I said, they are called 'clocks'
but for the time being they are only frequency standards.
(precisely because they cannot be used yet to stabilise a quartz
clock)
>
The process of turning a frequency standard into a clock is fairly
complicated but the devices are already sold as clocks.
>
From an engineering point of view that is just being able to count.
>
Jan
>
>
Time is a universal parameter of most theories of mechanics,
and the useful ones.
>
Too bad for most theories of mechanics; too
bad for your moronic physics.
>
>
>
Time is a universal _absolute_ parameter.
>
What you actually mean is 'universal'.
>
You have, for some odd reasons, the idea, that the entire universe must
but universally synchronized.
>
About space-contraction as length-contraction and
time-dilation together, has that clocks "slow" or
"meet" about differences between "space-contraction-linear"
and "space-contraction-rotational", breaking out the
"space-contraction" as "-linear" and "-rotational"
instead of "length-contraction" and "time-dilation".
>
Even stranger is, that clocks and time are used interchangeable.
>
But a clock is a man-made device, while time is a natural phenomenon and
not supposed to depend on clocks (because nature is not man-made).
>
This is a very euclidean account.
>
Bad enough
>
>
TH
>
It's a "clock hypothesis", that a "clock hypothesis" is that
the universe has one, a "clock hypothesis" is usual in many
accounts of physics the theory, for example Einstein has one.
Most people think he doesn't because they're confused by aspects
of relativity theory, and about Minkowski then the space-time,
yet he says so, Einstein, for example in "Out of My Later Years".
Anything else eventually violates causality, or the usual idea
that there's a physics at all, a "cosmological principle".
Well, possibly causality is violated on cosmic scale.
What we regard as obvious and simply proven fact is mainly based upon our own experience and than upon our main place of being here on planet Earth.
But what happens in the entire universe is essentially unknown. Possibly our intuition is totally wrong, because we have no knowledge about how time behaves in the rest of the universe.
I personally think, that time isn't universal, but only local.
Other places have also local time, but that time could be different, if such remote locations have no causality connection with us.
I think, that 'backwards time' is actually a necessity in cosmology, because that would allow to balance the content of the universe.
TH
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