Well said Tom Regards.
Max. K 4 O D S. Email: [EMAIL PROTECTED] Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with tubes group send an email to, [EMAIL PROTECTED] ----- Original Message ----- From: "Tom Fowle" <[EMAIL PROTECTED]> To: <blindhandyman@yahoogroups.com> Sent: Wednesday, August 29, 2007 11:52 AM Subject: Re: [BlindHandyMan] What Do You Want Information ON? > spiro, > I'll take a crack at magnetism etc. but its a big subject. > > Magnets are made of a compound that is mined called magnatite, > strange what? It is some combination of iron, and only metals > that contain some iron are effected by magnetism to any degree. > there are modern so-called "rare earth" magnets that are also > very powerfull. > > You make magnetically susceptable materials more magnetic by > building a powerfull electromagnet, a coil of wire wound around an > iron core shaped like a horseshoe. Wen you pass a D.C. electrical > current through this coil, a strong magnetic field developes > around the horseshoe and especially between the open ends. If > you put a chunk of iron across these ends and turn on the juice > for quite a while, the magnetic field in the electro magnet will > cause the atoms in the iron to allign in the same direction and > make it a permenant magnet. > > The strength in the magnetic field is measured in Gause, and the > physics of what the units mean is beyond me right now. > > The important thing to know is that the strength goes down as the > squaire of the distance from the magnet. Thus the strength of > the field at 2 inches is the square root of the strength at one > inch. > > As for eating magnets, other than the possible blockage caused by > the chunk of metal, I know of no reason why it would do you any > harm. They put large magnets down cattle's guts to gather > together chunks of wire that cows eat with feed. This reduces > the chances of this wire puncturing the lining of the poor > beast's stomachs. You can get these cow magnets at places like > Orchard supply, and they're about 2 inches long and nicely > rounded ovals. Hang one from a string and you've got a tactile > compass. > > Although magnetic fields do hav some effects on tissues, when > very very powerfull and properly directed, there is no decent > scientific evidence that any magnetic field you could normally > run into has any effect on your body in any way good or bad. > > All the people who sell magnetically based stuff for health cures > are either fools or liars period, no matter what kind of > testimonials they offer. > > Way back in the 1700s there waws a craze for magnetic cure alls, > back when the science had not yet been done. > > they sold magnets like they do these days to cure anything. > > So good old ben franklin made up some wooden simulations and > painted them up like magnets and did a real scientific double > blind test with them and the real magnets. > > Strange to say, the wooden magnets cured folks as well as the > real ones did. > > but people don't want to know that, since they don't know > anything about physics, let alone how to evaluate scientific or > non scientific data, they still want to believe in magnetism as a > health cure. > > Yes, as I said, there are medical uses for very powerfull > magnetic fields as in MRI, magnetic resonance imaging and that > works but does no harm. > > By the way MRI uses a high strength radio frequency field along > with very very very powerfull magnetic fields to vibrate the > electrons in the tissues of your body, and you'll not find a > single piece of credible evidence that it does anything bad. > > Very high strength radio frequency fields are not a good idea on > your tissues as theyc an cause internal heating like microwave > ovens do on purpose, but again to have any effect they have to be > pretty powerfull and applied for a long time. > > Cell phones probably do much more harm from making people act > like idiots behind the wheel or on the sidewalk because they're > yelling 'huh, huh, what' all the time than they may do from any > actual electrical or radio frequency effects. > > This is not the place for a long explanation of how MRI works, to > produce detailed pictures of your insides but it does. > > so, in conclusion, magnetism is made by alligning the atoms of > particular materials, mostly containing iron and other > metals, so that they are all the same direction. A detailed > explanation of how the magnetic field is realy produced needs an > advanced degree in physics which i ain't got. > > Oh , and nobody can sell you individual magnetic north or south > poles, all magnetized materials have both. so don't go for that > crackpot either. > > Remember, most importantly,the power of the magnetic field > reduces as the square of the distance. > > Very very powerfull fields are needed to have any effect on > tissues at all and nothing sold to you on an infomercial will do > any good or harm other than to your credic card, and your > credulity. > > there'se a start anyhow, hope it helps. > > tom Fowle > > > > Net-Tamer V 1.13 Beta - Registered > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various > List Members At The Following address: > http://www.jaws-users.com/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/blindhandyman@yahoogroups.com/ > > If you would like to join the Blind Computing list, then visit the > following address for more information: > http://jaws-users.com/mailman/listinfo/blind-computing_jaws-users.com > > For a complete list of email commands pertaining to the Blind Handy Man > list just send a blank message to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.484 / Virus Database: 269.12.12/979 - Release Date: 8/29/2007 > 8:21 PM > >
