Re: Physics Question

From	Fabian Russell <fb@zen.info>
Newsgroups	sci.physics
Subject	Re: Physics Question
Date	2016-07-10 19:25 +0000
Organization	NewsGuy - Unlimited Usenet $23.95
Message-ID	<nlu7fv02i4h@news4.newsguy.com> (permalink)
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On Sun, 10 Jul 2016 11:15:03 -0500, Sergio wrote:

> 
> found the orgional source, the answer is D, 
>

If the answer is 14.4 minutes, then the reaction
cannot be consecutive first-order reactions,
A --> B --> C

The reaction has to be a decay by two separate
and distinct processes:

A --> B, or A --> B'

But this make no sense for radioactive decay because
a nucleus does not "decay" by gamma emission.  In
gamma emission the number of protons and neutrons
does not change.

Gamma emission is usually the result of a previous decay
mode which leaves the nucleus in an excited state.  This
excited state will then emit a gamma photon.  But the
gamma emission is always a subsequent, or consecutive
reaction.

It seems to me that the problem statement is faulty.

Thread

Physics Question Sergio <invalid@invalid.com> - 2016-07-07 08:28 -0500
  Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-08 09:02 +0200
    Re: Physics Question Sergio <invalid@invalid.com> - 2016-07-08 09:19 -0500
    Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-08 15:06 +0000
      Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-08 10:11 -0500
        Re: Physics Question benj <benj@nobody.net> - 2016-07-08 17:12 -0400
          Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-08 16:32 -0500
            Re: Physics Question Sergio <invalid@invalid.com> - 2016-07-10 11:15 -0500
              Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-10 19:25 +0000
                Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-10 15:43 -0500
                Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-10 21:52 +0000
                Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-11 07:50 -0500
                Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-11 17:04 +0200
                Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-11 01:20 +0000
      Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-08 19:01 +0200
        Re: Physics Question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-07-09 21:28 +0200
          Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-10 02:18 +0000
    Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-09 17:11 +0000

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