rm common misunderstanding about "real" and "imaginary" terminology

'''Real numbers''' ~~can be thought of as ~~are numbers ~~which ~~that can be represented by some infinite or finite decimal representation, such as 0.707106781187..~~.~~ ~~They are called "real" because they actually exist in the real world, i.e. measures, weights, temperatures and so on are all real numbers, as opposed to the [[imaginary number]]s, which are just an abstract concept, but do not really exist~~.

In classical physics, measurements of things that can vary smoothly and continuously, like [[speed]] or [[temperature]], are treated as real numbers.