Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > sci.physics.relativity > #596598

Re: SR without panties

From Thomas Heger <ttt_heg@web.de>
Newsgroups sci.physics.relativity
Subject Re: SR without panties
Date 2022-12-01 10:33 +0100
Message-ID <juranjFierrU1@mid.individual.net> (permalink)
References (2 earlier) <juj493FagnlU1@mid.individual.net> <julr4fFn8gjU1@mid.individual.net> <jun2bhFt378U1@mid.individual.net> <juogu6F5a50U1@mid.individual.net> <jupj2hFa0thU1@mid.individual.net>

Show all headers | View raw


Am 30.11.2022 um 18:43 schrieb whodat:

>>>>> If you use the term "relative to" then there is no + or -. As a
>>>>> simple "difference" the number is absolute. There are workarounds
>>>>> that can get you to arithmetic differences. I realize this is a
>>>>> sort of nitpick, but I think it is an important one.
>>>> ???
>>>>
>>>> To me this sounds like nonsense!
>>>
>>>
>>> Of course it does, but then you lack the basic essential skills
>>> essential to understanding such elementary things. Please find
>>> pastimes better suited to your abilities. Thanks.
>>
>>
>> What you call 'basic skills' apparently includes to call negative
>> numbers 'positive'.
>>
>> I cannot follow you here, because to me this sounds disgusting.
>>
>> In physics velocity is always a vector and has always a direction.
>
> Velocity can be modeled as a vector. The OP problem addresses motion of
> one object relative to another. Direction plays no role in the posted
> question. To do so now is a fallacy called moving the goalposts.

???

You mentioned 'motion of one object relative to another' and that this 
is the topic under consideration.

I would agree and use the usual concept of velocity for this situation.

But you actually flatten me by stating, that direction plays no role.


>> If you like to address the amount, you could do so and omit the sign
>> and direction by writing |v|.
>>
>> If you don't, v is a vector.
>>
>> TH
>
> Speed is never negative. Speed has magnitude and direction.

NO!
'Speed' is the quantity an odometer measures.

This quantity is independent of direction.

> "-" is not a direction.

That depends...

'direction' is a geometrical term, which is usually associated with 
Euclidean space.

But other spaces are thinkable, where only two directions exist: '+' and 
'-'.


...


TH

Back to sci.physics.relativity | Previous | NextPrevious in thread | Next in thread | Find similar | Unroll thread


Thread

SR without panties beda pietanza <bedapietanza@gmail.com> - 2022-11-27 15:43 -0800
  Re: SR without panties rotchm <rotchm@gmail.com> - 2022-11-27 17:38 -0800
  Re: SR without panties rotchm <rotchm@gmail.com> - 2022-11-27 17:42 -0800
    Re: SR without panties beda pietanza <bedapietanza@gmail.com> - 2022-11-28 01:43 -0800
    Re: SR without panties Maciej Wozniak <maluwozniak@gmail.com> - 2022-11-28 01:53 -0800
  Re: SR without panties Volney <volney@invalid.invalid> - 2022-11-28 01:28 -0500
    Re: SR without panties whodat <whodaat@void.nowgre.com> - 2022-11-28 00:54 -0600
      Re: SR without panties Thomas Heger <ttt_heg@web.de> - 2022-11-29 08:36 +0100
        Re: SR without panties beda pietanza <bedapietanza@gmail.com> - 2022-11-29 02:33 -0800
        Re: SR without panties whodat <whodaat@void.nowgre.com> - 2022-11-29 12:46 -0600
          Re: SR without panties Thomas Heger <ttt_heg@web.de> - 2022-11-30 09:01 +0100
            Re: SR without panties whodat <whodaat@void.nowgre.com> - 2022-11-30 11:43 -0600
              Re: SR without panties Thomas Heger <ttt_heg@web.de> - 2022-12-01 10:33 +0100
                Re: SR without panties Mitch Leoni <nien@iltcntco.ws> - 2022-12-01 16:15 +0000
                Re: SR without panties Thomas Heger <ttt_heg@web.de> - 2022-12-02 08:04 +0100
    Re: SR without panties Maciej Wozniak <maluwozniak@gmail.com> - 2022-11-27 23:09 -0800
    Re: SR without panties beda pietanza <bedapietanza@gmail.com> - 2022-11-29 02:23 -0800
      Re: SR without panties Volney <volney@invalid.invalid> - 2022-11-29 21:52 -0500
        Re: SR without panties Maciej Wozniak <maluwozniak@gmail.com> - 2022-11-29 22:40 -0800
        Re: SR without panties beda pietanza <bedapietanza@gmail.com> - 2022-11-30 03:47 -0800

csiph-web