The Balloon in the Car and General Relativity
Today we are going to speculate on a particular experiment anyone can do with a car and a helium-inflated balloon. The set-up is quite simple: fix the balloon to the…
Trigonometry, Beats, and Instrument Tuning
Sometimes mathematical formulas that only seem to be interesting from a theoretical point of view can reveal unexpected connections with some applied problem. This is the case of the "sum…
3 Amazing Properties of Rotating Black Holes
3 amazing properties of rotating black holes: non planar orbits, energy extraction, time travel.