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This interactive presentation, created by Terry Bartelt and hosted by the Electromechanical Digital Library, provides an explanation of how a metal detector functions. Most people take for granted this common piece of equipment, but the science behind its function is actually quite remarkable. Bartelt uses flash animations and diagrams to examine how these machines work. These animations show everything from the different pieces of the machine to the sine waves and magnetic fields employed by the detector. Without such a detailed outline, these concepts would be much more difficult to grasp, and the author makes the presentation accessible for almost any grade level. Because of this, this would be a wonderful activity for a physics, or even mathematics, course.
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