Why three prongs?
Why do AC cords need three prongs? If there is no positive or negative in AC systems, why do we have HOT and NEUTRAL? I attempt to shed light on some of these mysteries.
Contains both useful science education and TOTAL CRACK-BRAINED DETRIUS. Amateur science resources, many new science projects for kids, textbook errors, Tesla coils, physics teaching, electricity articles, electrostatics projects. Weird science including antigrav, free energy, ball lightning, anomaly reporting, DIY…
Visit amasci.com → On Hacker News Jun 2012 – Jan 2025
Science & Space 7Hardware & Electronics 4Society, Policy & Culture 2Life, Learning & Writing 1
Why do AC cords need three prongs? If there is no positive or negative in AC systems, why do we have HOT and NEUTRAL? I attempt to shed light on some of these mysteries.
I've stumbled across a technique for drawing holograms directly upon a plastic plate by hand. It sounds impossible, but I've been sitting on the livingroom sofa making holographic images of floating polyhedra, words, 3D starfields, opaque objects, etc. No laser, no isolation table, no darkroom, no expensive film…
What is electricity? This question is impossible to answer because the word " Electricity " has several contradictory meanings. These different meanings are incompatible, and the contradictions confuse everyone. If you don't understand electricity, you're not alone. Even teachers, engineers, and scientists have a hard…
Most technician textbooks do a very poor job of explaining the details of transistors' internal workings. First they assume that the Base current is somehow controlling the Collector current, then they try to explain how one current can affect another. These explanations invariably fail because Bipolar transistors…