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Principia Mathematica: Let's Revisit Newton's Laws
Principia Mathematica: Let's Revisit Newton's Laws
Newton’s Principia Mathematica, the book published in 1687, contains Newton’s three laws of motion. Most people think he wrote it to explain forces on blocks, falling stones, and pulleys. But that’s not true. The purpose of the book was to...
Can a Helium Balloon Defy Physics?
Can a Helium Balloon Defy Physics?

Featured Products Watch this video and it almost seems like this balloon's actions are counter-intuitive to everything we know about motion and inertia. Let Professor Joel Bryan from Ball State University explain what is really going on. Ask any student...