Groups > sci.physics > #520628

Re: Relativistic Radio

From	Poutnik <poutnik4nntp@gmail.com>
Newsgroups	sci.physics
Subject	Re: Relativistic Radio
Date	2015-09-13 09:08 +0200
Organization	Good company
Message-ID	<mt3791$q4q$1@dont-email.me> (permalink)
References	(11 earlier) <msuv3d$bom$1@speranza.aioe.org> <6eb355ae-0ce9-4a02-8cf3-bdbacba8a07b@googlegroups.com> <mt2bkn$nmt$1@dont-email.me> <0733dab1-fdab-43ae-8d06-113152095cd8@googlegroups.com> <mt35ci$lbc$1@dont-email.me>

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Dne 13/09/2015 v 08:35 Poutnik napsal(a):
>> The important speed is not how fast the ball moves relative to the ejector, but
>> rather how fast it hits the target. 

Both are not speeds, but closing speeds.

Speed is defined as size of velocity vector.
Closing speed is defined as size of difference of 2 velocity vectors.

> It is the same, unless there is acceleration, what is not the case.
> Both are the same quantity, closing speed ball vs target.

I have misread your sentence, so I revoke this my response above.

Both the ball *speed* ( not ball-vs ejector closing speed )
and ball-target closing speed are important.

As the speed defines* kinetic energy of the ball and the target,
while ball-target closing speed defines* for inelastic collision case,
how much of *total* kinetic energy from *both* objects is converted.

If the target was still,
all collision energy comes from the moving ball.

If the ball was still,
all collision energy comes from the moving target.

If both were moving, collision energy comes from both.

In both frames, initial and final kinetic energy of objects are
different, for both elastic and not elastic cases.

* together with involved masses

-- 
Poutnik ( the Czech word for a wanderer )

Knowledge makes great men humble, but small men arrogant.

Thread

Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-06 20:21 +0000
  Re: Relativistic Radio Double-A <double-a3@hush.com> - 2015-09-06 14:34 -0700
    Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-06 21:47 +0000
  Re: Relativistic Radio pcardinale@volcanomail.com - 2015-09-06 17:36 -0700
    Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-07 01:56 +0000
      Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-07 07:15 +0200
        Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-07 05:44 +0000
          Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-07 08:50 +0200
      Re: Relativistic Radio pcardinale@volcanomail.com - 2015-09-07 15:16 -0700
      Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-08 10:04 -0500
        Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-08 16:59 +0000
          Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-08 12:41 -0500
            Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-08 18:24 +0000
          Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-08 21:22 +0200
        Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-08 17:43 +0000
          Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-08 12:47 -0500
            Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-08 19:26 +0000
        Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-10 01:58 -0700
          Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-10 19:16 +0200
            Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-10 19:42 +0200
              Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-11 00:53 -0700
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-11 06:07 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-11 15:08 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-11 15:28 +0200
                Re: Relativistic Radio Mahipal <mahipal7638@gmail.com> - 2015-09-11 06:31 -0700
                Re: Relativistic Radio "Phony McNymster" <invalid@example.com> - 2015-09-11 07:42 -0700
                Re: Relativistic Radio Mahipal <mahipal7638@gmail.com> - 2015-09-11 07:59 -0700
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-11 07:16 -0700
                Re: Relativistic Radio Sam Wormley <swormley1@gmail.com> - 2015-09-11 09:41 -0500
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-11 09:49 -0500
                Re: Relativistic Radio Fabian Russell <root@localhost.localdomain> - 2015-09-11 18:18 +0000
                Re: Relativistic Radio noTthaTguY <abu.kuanysh05@gmail.com> - 2015-09-11 11:24 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-12 11:20 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-12 06:21 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 02:04 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-13 00:07 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 09:22 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 09:59 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-13 03:44 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-14 07:33 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-14 07:49 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 01:07 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 10:40 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 03:40 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 13:19 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 04:55 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 15:01 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 16:36 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 12:18 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 08:29 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 02:41 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 12:11 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 06:06 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 15:40 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 06:06 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 15:59 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 09:39 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 18:47 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 10:10 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 19:57 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 11:14 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 20:23 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 20:31 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 12:21 -0700
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-15 13:30 -0500
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 00:57 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 14:50 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 12:57 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 08:37 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 03:06 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 13:10 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 13:15 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-15 06:43 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 16:11 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 18:26 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 18:35 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 16:44 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-14 08:15 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-14 08:44 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-11 17:38 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-11 18:00 +0200
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-11 11:22 -0500
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-12 12:29 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 01:16 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-12 23:09 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 08:35 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 08:44 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-12 23:50 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 09:14 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-13 05:24 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-14 07:35 +0200
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 01:01 -0700
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-14 10:39 +0200
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-14 09:34 -0500
                Re: Relativistic Radio jaymoseley@hotmail.com - 2015-09-14 12:31 -0700
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-15 08:53 +0200
                Re: Relativistic Radio Poutnik <Poutnik4NNTP@gmail.com> - 2015-09-15 10:22 +0200
                Re: Relativistic Radio Poutnik <poutnik4nntp@gmail.com> - 2015-09-13 09:08 +0200
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-14 09:32 -0500
                Re: Relativistic Radio Odd Bodkin <bodkinodd@gmail.com> - 2015-09-14 09:31 -0500

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