You can't see a giant rolling version of London and not calculate the heck out of it.
Can fast-moving plastic sheets create an invisible wall? Maybe, maybe not. But you can definitely explore the electric effects of plastic on your own.
Let's calculate how much energy your LEDs suck up relative to old-school incandescents.
Thermoelectric generators with no moving parts are small and reliable—which makes them perfect for spacecraft like Voyager and Cassini.
This crazy parkour move, where a guy bounds up between two walls by jumping from one to the other, is based on the momentum principle and friction.
The spring inside a clicky pen is a perfect way to learn about projectile motion.
There’s no fooling gravity—but this trick makes it look like you can.
Frame-by-frame video analysis shows an illegal forward pass—but in the reference frame of the QB, it's backward.
In normal water, a human just barely floats. But the *Stranger Things* kids know a workaround.
You can use angular momentum to describe everything from fidget spinners to back flips to interstellar asteroids. Let's see how it works.