Question

what are the four application of the principles of densions on what principle are the above based

Answer 1

The physical quantities those can be expressed in terms of fundamental physical quantities are called derived physical quantities. All the physical quantities of interest can be derived from the base quantities. The power (exponent) of base quantity that enters into the expression of a physical quantity, is called the dimension of the quantity in that base. Broadly speaking, dimension is the nature of a Physical quantity. Understanding of this nature helps us in many ways.