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Magnetism in the 21st Century

By: Sarah Johnson

Sarah Johnson

on 29 April 2010

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Transcript of Magnetism in the 21st Century

Magnetix The magnets connect to each other allowing you to make things. CD Player The tracking mechanism in the CD moves the lens along the CD, therefore tracking the grooves. The stepper motor can contol the electromagnets and keep the lens focused on the groove of the CD. MAGLEV TRAINS A maglev train moves by using a set of magnets that repel each other and two coils attached to an electric strip that propel it. MRI Scanners A large magnets surrounds the person and scans nuclei of the body's atoms and sends nuclei of the body's atoms to a radio signal, temporarily knocking some of them out of alignment. When the signal stops, the nuclei return to the aligned position, releasing their own faint radio frequencies, which are sent to a computer to build up detailed images of the patient's anatomy.
Bibliography http://www.howstuffworks.com/maglev-train.htm http://www.coloradocollege.edu/dept/PC/RepresentativePhy/Pages/Photoshop/Problem%20Pictures/maglev-train.gif http://www.epinions.com/review/Magnetix_60_Count_Extreme_Combo/content_416133844612 http://www.rogersconnection.com/images/MagnetixRCtetra.jpg http://www.ehow.com/how-does_4965987_cd-player-use-magnets.html http://www.sz-wholesale.com/uploadFiles/upimg2%5CCD-player_72.jpg http://www.howstuffworks.com/mri.htm http://www.fishermenshospital.com/Resources/18/FileRepository/MRI2.jpg White Dwarf Stars that have magnetic fields 100,000 times stronger than the typical magnetic star. http://www.williamsclass.com/EighthScienceWork/ImagesEighth/WhiteDwarfSirius.jpg http://www.space.com/scienceastronomy/magnetic_stars_041102.html THE END
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