Rotational forces
in [Physics]
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From: Darwin123 on 11 Aug 2010 21:26 On Aug 11, 4:46 pm, "Androcles" <Headmas...(a)Hogwarts.physics_z> wrote: > 1) Why does the electromagnetic field retain its circular integrity? > 2) Why would a circular fluid hold its shape? > =============================================== > Use known facts, drosen. Light travels in beams, no "if" needed. Aww. You mean there is no such thing a light spreading isotropically? What happened to spherical wave fronts? What happened to orbital angular momentum in light? What do you mean by "beam?" I don't think you know what a beam is. You have no idea what it has to do with fluids. You are just babbling. You don't have any facts. Beams are not always circular. Have you gone to a movie recently? The beams coming out of the projector are not entirely circular or cylindrical. The image projected by the beam gives a noncircular structure to the beam. Look up images. There is an entire field within optics called "imaging". Light does not always travel in cylinders devoid of internal structure. That is what you probably mean by beam.
From: John Doe on 11 Aug 2010 23:55 Darwin123 <drosen0000 yahoo.com> wrote: > On Aug 11, 4:46�pm, "Androcles" <Headmas... Hogwarts.physics_z> wrote: > >> 1) Why does the electromagnetic field retain its circular integrity? >> 2) Why would a circular fluid hold its shape? >> ======================== > ======================> Use known facts, drosen. Light travels in beams, no "if" needed. > Aww. You mean there is no such thing a light spreading > isotropically? What happened to spherical wave fronts? What happened > to orbital angular momentum in light? What do you mean by "beam?" > I don't think you know what a beam is. You have no idea what it has > to do with fluids. You are just babbling. As opposed to playing mind games... -- > You don't have any facts. Beams are not always circular. Have you > gone to a movie recently? The beams coming out of the projector are > not entirely circular or cylindrical. The image projected by the beam > gives a noncircular structure to the beam. > Look up images. There is an entire field within optics called > "imaging". Light does not always travel in cylinders devoid of > internal structure. That is what you probably mean by beam. > > See also Google Groups > Path: news.astraweb.com!border1.newsrouter.astraweb.com!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!j8g2000yqd.googlegroups.com!not-for-mail > From: Darwin123 <drosen0000 yahoo.com> > Newsgroups: sci.physics > Subject: Re: Rotational forces > Date: Wed, 11 Aug 2010 18:26:14 -0700 (PDT) > Organization: http://groups.google.com > Lines: 19 > Message-ID: <1533cf67-f282-46d2-8508-2be719c0f16a j8g2000yqd.googlegroups.com> > References: <67406b05-6aa5-4ba0-861c-2fb07be6a81e l14g2000yql.googlegroups.com> <654cbbbe-28d5-4468-902c-0ec61fb0c6ae x25g2000yqj.googlegroups.com> <F_D8o.107501$on2.28025 hurricane> > NNTP-Posting-Host: 72.165.84.88 > Mime-Version: 1.0 > Content-Type: text/plain; charset=ISO-8859-1 > Content-Transfer-Encoding: quoted-printable > X-Trace: posting.google.com 1281576374 350 127.0.0.1 (12 Aug 2010 01:26:14 GMT) > X-Complaints-To: groups-abuse google.com > NNTP-Posting-Date: Thu, 12 Aug 2010 01:26:14 +0000 (UTC) > Complaints-To: groups-abuse google.com > Injection-Info: j8g2000yqd.googlegroups.com; posting-host=72.165.84.88; posting-account=C03jXAoAAAB5gW0cBd6wQoFEj30Iwz0z > User-Agent: G2/1.0 > X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8,gzip(gfe) >
From: JT on 12 Aug 2010 02:40 On 11 Aug, 22:19, Darwin123 <drosen0...(a)yahoo.com> wrote: > On Aug 11, 6:19 am, JT <jonas.thornv...(a)hotmail.com> wrote: > > > If we have a circularshaped magneticfluid where an electromagnetic > > field hold it's circular integrity, if we now assume that this > > electromagnetic field made up of lot of coils also is able to make the > > electromagnetic fluid rotate/spin within the fields created by the > > coils and yet hold the fluids shape stay intact. > > > What will happen if we turn of the coils? > > > JT > > If we have dragon, and it devours a unicorn, and the unicorn > doesn't struggle as it is swallowed by the dragon, what when the > dragon turns its coils? > What I am trying to say is that you have presented a lot of ifs. > If you want a serious answer to this question, please answer the > following two questions seriously. > 1) Why does the electromagnetic field retain its circular integrity? Well there is no problem whatsoever creating an electromagnetic field containing a ferromagnetic fluid. > 2) Why would a circular fluid hold its shape? Because the fluid is ferromagnetic and there is an electromagnetic field that do not let it escape. JT
From: Darwin123 on 12 Aug 2010 12:04
On Aug 12, 2:40 am, JT <jonas.thornv...(a)hotmail.com> wrote: > > 1) Why does the electromagnetic field retain its circular integrity? > > Well there is no problem whatsoever creating an electromagnetic field > containing a ferromagnetic fluid.> 2) Why would a circular fluid hold its shape? > > Because the fluid is ferromagnetic and there is an electromagnetic > field that do not let it escape. > > JT >If we have a circularshaped magneticfluid where an electromagnetic >field hold it's circular integrity You are hypothesizing that the ferromagnetic fluid is held in a spherical shape by an electromagnetic field with circular integrity. I haven't done any serious calculations with this. However, I immediately see several difficulties with this. The most serious is this. Ferromagnetic materials are intrinsically anisotropic because there is no magnetic monopole. The magnetic domains have a north and south pole that points that define an axis with a particular direction. Even if a ferromagnetic material that isotropic on a macroscopic scale is made up of smaller domains aligned randomly. Thus, the spherical shape of a ferromagnetic fluid is going to be perturbed immediately on a microscopic scale. The electromagnetic field inside the magnetic material can not retain its "circular integrity" on a microscopic scale. Ferromagnetic solids lose their ferromagnetic properties when melted. Therefore, there is no ferromagnetic material that is completely fluid. There are no true gases that are ferromagnetic and no true liquids that are ferromagnetic. One can mix a ferromagnetic solid with a fluid. For instance, one could suspend magnetized iron filings in a dense liquid. Thus, there may be composite materials that can roughly be called "ferromagnetic fluids". However, the same problem occurs on a microscopic scale. The tiny particles of ferromagnetic solid will perturb the circular integrity of the electromagnetic field. You are getting closer to the general problem with the question. Your original hypothesis is over-constrained. The electromagnetic field may have to lose its circular integrity in order to ensure the magnetic field is spherical. Perhaps I am playing mind games. However, doesn't contradict my conjecture that the question was ill-posed. Maybe the person who presented this ill-posed problem is himself playing a mind-game. Scientists who ask questions, when told their questions are ill-posed, try to change the question into something that is better posed. |