What is the unit of Mhz?

"MHZ" should actually be written as "MHz", which consists of two-dimensional units. The "m" in front is a digital unit of millions, which is the prefix of English Mega and can also be called "trillion".

It is called dimensional formula or dimensional product. It qualitatively expresses the relationship between derived quantity and basic quantity. For the basic quantity, its dimension is itself. In the history of physics development, various measurement systems have been established: CGS measurement system, electrostatic measurement system, Gaussian measurement system and so on.

Dimensions refer to the basic properties of physical quantities. The study of physics can quantitatively describe various physical phenomena, and there is a close relationship between various physical quantities used in the description, that is, there is a definite functional relationship between them. In order to accurately describe these relationships, physical quantities can be divided into basic quantities and derived quantities.

Basic quantity is a physical quantity with independent dimensions, and derived quantity refers to a physical quantity whose dimensions can be expressed as a combination of basic quantities. All derived quantities can be derived from basic quantities, thus establishing the functional relationship between the whole physical quantities. This functional relationship is usually called a quantitative system. In a given quantitative system, an expression of dimensions is expressed by the product of the powers of basic dimensions.