Online Technical Lessons

- How does a photocopier work? - How does a compact disk work? - How do optical fibers work? - How does a microprocessor (e.g. the Pentium) work? - How do the barcode scanners in a grocery store work? http://www.howstuffworks.com/upc.htm - How does digital electronics work? http://howstuffworks.lycos.com/category.htm?cat=Video	- What can you tell me about microwave ovens? http://www.gallawa.com/microtech/how_work.html http://www.physics.udel.edu/~watson/scen103/less-muwave.html - How does my telephone work? - How do integrated circuits work? - How does a microcomputer work? - How does the magnetic strip on my student ID work? - Why don't perpetual motion machines exist?http://www.kilty.com/pmotion.htm http://www.phact.org/e/dennis4.html History http://www.free-energy.co.uk/

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