Received: by 10.180.102.231 with SMTP id fr7mr653310wib.4.1351628901446;
        Tue, 30 Oct 2012 13:28:21 -0700 (PDT)
MIME-Version: 1.0
Path: q13ni108878wii.0!nntp.google.com!feeder2.cambriumusenet.nl!feeder1.cambriumusenet.nl!feed.tweaknews.nl!87.79.20.101.MISMATCH!newsreader4.netcologne.de!news.netcologne.de!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!mx04.eternal-september.org!.POSTED!not-for-mail
From: thro...@sheol.org (Wayne Throop)
Newsgroups: rec.arts.sf.written
Subject: Re: Warp Drive May Be More Feasible Than Thought, Scientists Say
Date: Tue, 30 Oct 2012 19:48:28 GMT
Organization: sheol
Lines: 22
Message-ID: <1351626508@sheol.org>
References: <1350573472@sheol.org> <Z8dgs.2849$hh4.168@newsfe01.iad>
    <1350660582@sheol.org> <PNegs.217$rn3.121@newsfe13.iad>
    <1350662554@sheol.org> <unvgs.9$ba6.5@newsfe22.iad>
    <1350745761@sheol.org> <dUPgs.822$LR4.300@newsfe09.iad>
    <1350857640@sheol.org> <ckchs.21559$lI5.14750@newsfe12.iad>
    <1350917612@sheol.org> <A_Phs.211$oI6.33@newsfe23.iad>
    <1351095854@sheol.org> <RqRis.19980$6S6.18799@newsfe12.iad>
    <1351351043@sheol.org>
    <ddf9ca9c-0c9e-4675-8053-2eb189675961@googlegroups.com>
    <afaofgFu15jU1@mid.individual.net>
Injection-Info: mx04.eternal-september.org; posting-host="5298f94119872afbd282ee92b4c339c3";
	logging-data="23935"; mail-complaints-to="ab...@eternal-september.org";	posting-account="U2FsdGVkX19kiIwAvwgozQtQAy5BP1PI"
Cancel-Lock: sha1:Yj51xKPvTwqLDfGOovc3Z26PCGA=

: Greg Goss <go...@gossg.org>
: OK, the Atlantic Ocean is a rather large sensor to examine it with,
: but it still counts. 

OK.  But upthread, the argument was how to you tell the
difference between changing magnetic fields cause an electric field"
from "changing magnetic fields induce an electric current in metals"?

So similarly, how to distinguish between "chaning gravitational fields
cause an inverse cube tidal force" from "changing gravitational field
induce an inverse cube tidal force in the earth"?

Well... just look at Newton's equations (or, for those who grok tensors
as well as vectors, Einstein's).  It's obvious what's going on.
Similarly, just look at Maxwell's equations (and read the definitions
of the symbols and such).  It's obvious what's going on.

So. For the electrical case, you can look at charged particles in
magnetic fields, no metals need apply.  They behave as Maxwell describes.
Same with gravity; look at ... uh... gravitationally charged particles
in a gravitational field; "there is a tide", with nothing between the
particles to "induce" it in.