Question

What is dimensional analysis?​

Answer 1

Dimensional analysis :-

• Dimensional analysis is a method for finding or checking relations among physical quantities by using their dimensions.

• The dimension of a physical quantity is the combination of the basic physical dimensions (such as mass, length, time, electric charge and temperature) which describes it.

• Dimensional analysis is based on the fact that a physical law must be independent of the units used to measure the physical variables. 

For example :- the dimension of speed is length per time, LT-1.

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Answer 2

analysis using the fact that physical quantities added to or equated with each other must be expressed in terms of the same fundamental quantities (such as mass, length, or time) for inferences to be made about the relations between them

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