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trager kviten

on 29 April 2010

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Transcript of Magnets

medicine An MRI scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures. Navigation http://www.medicinenet.com/mri_scan/article.htm http://www.healthnode.org/wp-content/uploads/2008/04/mri2.JPG The bar magnet has been used for navigation sense the
twelevth or thirteenth century. http://www.universetoday.com/tag/bar-magnet/ http://upload.wikimedia.org/wikipedia/commons/d/d8/Bar_magnet.jpg Electronics Magnets are used in speakers to repel and attract one another causing the diaphram to move creating sound. http://electronics.howstuffworks.com/speaker6.htm http://www.gttkc.com/shop/images/categories/speakers.jpg Toys Toys use magnets all the time they are in things like the magnetic space wheel and joe binder http://www.coolmagnetman.com/magtoys.htm Astronomy Magnets are even used in the hubble telescope for its gyroscope which angles the hubble to gather its immages. http://history.nasa.gov/hubble/index.html http://scrapetv.com/News/News%20Pages/Science/images-2/hubble-space-telescope.jpg
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