Neodymium disk magnet, Grade 35, Diameter: 0.5 inch, Thickness: 0.25 inches, Weight: 0.013 Lbs, are made from the most powerful magnetic material in the world, are composed of neodymium, iron, boron and a few transition met
Energy Tube, teaching resource for an array of scientific concepts: open and closed circuits, conductors vs. Insulators, light waves, sound waves,currents, and energy, When a conductor touches both of the electrodes on tube, tube emits a sound and flashing red/green/blue LED lights
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