Re: ? ? ?

Liste des GroupesRevenir à sp relativity 
Sujet : Re: ? ? ?
De : ttt_heg (at) *nospam* web.de (Thomas Heger)
Groupes : sci.physics.relativity sci.physics sci.math
Date : 23. Mar 2024, 08:03:54
Autres entêtes
Message-ID : <l67csnFih2pU1@mid.individual.net>
References : 1 2 3 4 5 6 7 8
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Am 21.03.2024 um 14:46 schrieb Péter Juhász:
Thomas Heger wrote:
>
𝗶𝘁'𝘀_𝗡𝗢𝗧 a quantity, me frendo, but a fundamental dimension of the
world.
>
I always distinguish between a quantity and the measurement of this
quantity. E.g. 'length' is a (physical) quantity and is measured in
meters.
>
no, you don't. The meter is the length, not the space, which is a
dimension. You use space to count lengths, here meters.
I actually do, because 'meter' is the name of a unit, which is used to measure 'length'.
The length is a physical quantity, which is measured in meters (in the SI-unit-system), but the meter is not length (because it is a unit and not a quantity).
'Space' needs an additional qualifier, because it can have several different uses.
Apparently, you want to address the physical space around you with 'space'.
This space is actually three-dimensional.
If you like to eliminate time-dependency, you end up with Euclidean space.
That space has three dimensions of the type length.
...
TH

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