From Newton's Laws of Motion to electric forces, these concepts explain why matter behaves the way it does.artpartner-images/The Image Bank/Getty Images Physics is the science that quantifies reality.

Most of us first hear about the irrational number π (pi)—rounded off as 3.14, with an infinite number of decimal digits—in ...

For electricity to flow, everything needs to be connected in a big ring. It’s called a circuit. For example, the lights in most houses and flats are part of a circuit controlled by the consumer unit, ...