Which one of the following is a dimensionless quantity?(a) Mass(b) Weight(c) Specific weight(d) Reynold’s numberThe question was asked in an international level competition.Origin of the question is Dimensional Analysis and its Applications topic in portion Units and Measurements of Physics – Class 11

Which one of the following is a dimensionless quantity?(a) Mass(b) Wei

1.	Which one of the following is a dimensionless quantity?(a) Mass(b) Weight(c) Specific weight(d) Reynold’s numberThe question was asked in an international level competition.Origin of the question is Dimensional Analysis and its Applications topic in portion Units and Measurements of Physics – Class 11
Answer» The correct option is (d) Reynold’s NUMBER For explanation: Reynold’s number is a DIMENSIONLESS quantity. Its formula is Re = ρvD/μ. On solving the associated dimensional EQUATION, it will turn out that, Reynold’s number is dimensionless.

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