How Everything Works on Instagram: "Prof. Walter Lewin, the iconic MIT physicist, had a gift for turning abstract physics into moments you’d never forget. One of his most famous demos brought Bernoulli’s Principle to life: when air speeds up, its pressure drops. By blowing between two hanging objects—or across a loose sheet of paper—Lewin showed how the fast-moving air created a low-pressure region, pulling the objects together or lifting the paper. No heavy equations. Just simple, visual physic