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Re: Energy?

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There is no one person on earth that can even define correctly the
word...Energy.



Stefan Ram wrote:
> 
>   In a chapter of a book, the author gives this relation for a
>   system with mass m = 0:
> 
> E^2/c^2 = p^"3-vector" * p^"3-vector"
> 
>   . Then he writes, "This implies that either there is no particle
>   at all, E = 0, or we have a particle, E <> 0, and therefore
>   p^'3-vector' <> 0.".
> 
>   So, his intention is to kind of prove that a particle without mass
>   must have momentum.
> 
>   But I wonder: Does "E = 0" really mean, "there is no particle."?
> 
>   300 years ago, folks would have said, "m = 0" means that there is
>   no particle! Today, we know that there are particles with no mass.
> 
>   Can we be confident that "E = 0" means "no particle", or could there
>   be a particle with "E = 0"?
> 
>   Here's the Unicode:
> 
> E²/c² = p⃗ · p⃗
> 
>   and
> 
> |This implies that either there is no particle at all, E = 0, or we
> |have a particle, E ≠ 0, and therefore p⃗ ≠ 0.

-- 
The Starmaker -- To question the unquestionable, ask the unaskable,
to think the unthinkable, mention the unmentionable, say the unsayable, 
and challenge the unchallengeable.

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Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-07-29 17:14 -0700
  Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-07-29 20:43 -0700
    Re: Energy? Eddy Vadász <azsd@ddd.hu> - 2024-07-30 16:46 +0000
    Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-07-30 22:29 -0700
      Re: Energy? nospam@de-ster.demon.nl (J. J. Lodder) - 2024-07-31 10:02 +0200
        Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 10:30 +0200
          Re: Energy? hitlong@yahoo.com (gharnagel) - 2024-07-31 15:30 +0000
            Re: Energy? nospam@de-ster.demon.nl (J. J. Lodder) - 2024-07-31 21:02 +0200
              Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 22:37 +0200
            Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 22:43 +0200
              Re: Energy? hitlong@yahoo.com (gharnagel) - 2024-08-01 03:12 +0000
                Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 07:15 +0200
                Re: Energy? nospam@de-ster.demon.nl (J. J. Lodder) - 2024-08-02 10:05 +0200
                Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 11:05 +0200
                Re: Energy? Python <python@invalid.org> - 2024-08-02 13:32 +0200
                Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 15:22 +0200
                Re: Energy? Bobauk Guang Chou <gbnbu@agag.cn> - 2024-08-02 09:48 +0000
        Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 13:46 +0200
      Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-07-31 12:43 -0700
        Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-01 10:45 -0700
          Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-01 12:32 -0700
            Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-01 17:03 -0700
        Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-02 08:52 -0700
          Re: Energy? nospam@de-ster.demon.nl (J. J. Lodder) - 2024-08-03 12:43 +0200
            Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-03 16:30 +0200
              Re: Energy? Python <python@invalid.org> - 2024-08-03 16:38 +0200
                Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-03 17:37 +0200
            Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-03 18:22 -0700
              Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-03 19:46 -0700
              Re: Energy? Thomas Heger <ttt_heg@web.de> - 2024-08-04 11:22 +0200
                Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-04 08:03 -0700
                Re: Energy? Thomas Heger <ttt_heg@web.de> - 2024-08-05 09:01 +0200
                Re: Energy? hitlong@yahoo.com (gharnagel) - 2024-08-04 18:03 +0000
                Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-04 11:33 -0700
                Re: Energy? hitlong@yahoo.com (gharnagel) - 2024-08-04 19:38 +0000
                Re: Energy? Ross Finlayson <ross.a.finlayson@gmail.com> - 2024-08-04 13:16 -0700
                Re: Energy? Verdell Muklevich Fung <vvll@lhvvec.ru> - 2024-08-04 23:42 +0000
                Re: Energy? Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-04 22:13 +0200
                Re: Energy? Rictor Tatár <trttr@cirrtrra.hu> - 2024-08-05 11:08 +0000
              Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-05 08:45 -0700
                Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-06 10:15 -0700
                Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-07 11:13 -0700
                Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-09 09:38 -0700
                Re: Energy? Thomas Heger <ttt_heg@web.de> - 2024-08-10 10:37 +0200
                Re: Energy? The Starmaker <starmaker@ix.netcom.com> - 2024-08-10 09:59 -0700

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