which physical identity the unit mass -2
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Answer:
Mass, length, and force are examples of physical dimensions. ... The product of any dimension and the identity-dimension is the original ...
Answer:
A physical dimension is a property we associate with physical quantities for purposes of classification or differentiation. Mass, length, and force are examples of physical dimensions. Composite physical dimensions can be described by composing primitive dimensions. For example, Length/Time ('length over time') is a dimension that can be associated with a velocity.
A physical dimension is a property we associate with physical quantities for purposes of classification or differentiation. Mass, length, and force are examples of physical dimensions. Composite physical dimensions can be described by composing primitive dimensions. For example, Length/Time ('length over time') is a dimension that can be associated with a velocity.The composition operators for dimensions are * [dimension product] and expt [exponentiation to a real power], which have algebraic properties analogous to their use with real numbers. The product of any two dimensions is a dimension. There is an indentity element for * on dimensions; it is called the identity-dimension. The product of any dimension and the identity-dimension is the original dimension; any other product defines a new dimension. The analogy of division is exponentiation to a negative number.