I learned to respect friction, as a phenomenon with many nuances, when I was a graduate student. One day, while teaching a problem session in elementary mechanics, I unwisely invented a new ...

How to Solve the Biggest Mystery in Physics Reductionism breaks the world into elementary building blocks. Emergence finds the simple laws that arise out of complexity.

Physics Women in physics: Why there's a problem and how we can solve it Women are still wildly under-represented in physics – but it doesn't have to be like that.

Through Search and Lens, users may solve problems centering on geometry, trigonometry, physics, and calculus, with its equation available for every prompt.