Physics Facts

48 facts, from the everyday to the astonishing.

Mach 1 is the speed of sound. A Mach number is simply the ratio of an object's speed to the speed of sound in the air…

Atoms are the extremely small particles of which we, and everything around us, are made. A single element, such as…

Modern navigators rely on atomic clocks. Instead of old-style springs or pendulums, the natural resonances of atoms --…

Quarks are the most fundamental particles that we know of. Both protons and neutrons are made of quarks. We know quarks…

All Physics facts