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

Groups > sci.physics > #520551

Re: Relativistic Radio

From Poutnik <poutnik4nntp@gmail.com>
Newsgroups sci.physics
Subject Re: Relativistic Radio
Date 2015-09-13 01:16 +0200
Organization Good company
Message-ID <mt2bkn$nmt$1@dont-email.me> (permalink)
References (8 earlier) <msujlo$qpg$1@dont-email.me> <ab664cc6-1513-4186-90f6-10be3af0e660@googlegroups.com> <msusen$m3$1@dont-email.me> <msuv3d$bom$1@speranza.aioe.org> <6eb355ae-0ce9-4a02-8cf3-bdbacba8a07b@googlegroups.com>

Show all headers | View raw

Dne 12/09/2015 v 21:29 jaymoseley@hotmail.com napsal(a):
> Odd wrote...
>> In reality, the source and the detector are both in the source frame, with the source stationary in this frame and the detector moving in this frame. In this frame the energy emitted is the same as the energy received. Also in reality, the source and the detector are both in the detector frame, with the source moving in this frame and the detector stationary. In this frame, the energy emitted is the same as the energy received, though these two numbers are not the same as they are in the source frame.
> 
> This doesnt quite add up to me.You say the numbers are different in each frame.
> If I eject a ball at speed x at a target that moves towards the ball ejector at speed y, 
> the ball will hit the target at a combined speed of x+y.
> If I keep the target still and move the ball ejector towards the target at speed y
> and eject the ball at speed x. Then the ball hits the target at speed x+y.
> Thats the same number for both frames isnt it?
> 
Yes, as it relates not to speed, but to closing speed.

Closing speed is in Galileo transformation context invariant,
in contrary to energy or speed.

In the frame where the ball ejector is still,
the ball gains kinetic energy 1/2 . m . x^2.

In the frame where the ball ejector moves by speed y,
the ball gains kinetic energy 1/2 . m . [(x+y)^2 - y^2]
= 1/2 . m . [x^2 + 2.x.y],
having initially already energy 1/2 . m . y^2
and finally energy  1/2 . m . (x+y)^2.


-- 
Poutnik ( the Czech word for a wanderer )

Knowledge makes great men humble, but small men arrogant.

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

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

csiph-web