Question

what is dimensionaless constant? ​

Answer 1

here is your answer mate

In physics, a dimensionless physical constant, sometimes called a fundamental physical constant, is a physical constant that is dimensionless, i.e. a pure number having no units attached and having a numerical value that is independent of whatever system of units may be used.

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Answer 2

Answer:

Pure number having no unit attachment and having a numerical values that is independent of whatever system of unit may be used.