👉 A term used in mathematics and physics, specifically in the context of dimensions, to describe the scale or measurement of an object's size. It refers to how many times a given quantity is multiplied by itself. In terms of dimensional analysis, it can be defined as: 1. The ratio of one quantity to another is dimensionless if both quantities are expressed in units that have no effect on each other. 2. If the first quantity is expressed in units of length and the second quantity is expressed in