Question

Explain -

Dimensional quantities

Ddimensionless quantities

Answer 1

In dimensional analysis, a dimensionless quantity (or more precisely, a quantity with the dimensions of 1) is a quantity without any physical units and thus a pure number. Such a number is typically defined as a product or ratio of quantities which do have units, in such a way that all the units cancel out.

You may be confused with quantities having dimensions as dimensional qualities but that term doesn't exist.
Please close this query and then open a new one with that doubt.
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