Question

name three quantities having no dimensions and no uniTs
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Answer 1

There is no physical quantity which has dimensions but no units, because units are derived from the dimensional analysis itself.

However, on the contrary, there are some physical quantities which have no dimensions but still have units. For eg. Solid angle, angular velocity etc.

Answer 2

Answer:

pi, plank unit and, cosmological constant is the answer of the above question.