Which of the following physical quantities has no units?

Q. Which of the following physical quantities has no units?
Answer: Reynold Number
Notes: Reynold Number has no units. The Reynolds number is the ratio of inertial forces to viscous forces. It is used for predicting if a flow condition will be laminar or turbulent.

Unit of Rydberg constant: m^-1
Unit of Wave number = m^-1
Unit of Hubble constant = sec^-1

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📌 Question Number: 23 in Physics GK 02 - Units in the above course in App.

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