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Which among the following is not a dimensionless number?

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+1 vote
in Fluid Mechanics by (118k points)
Which among the following is not a dimensionless number?

(a) Reynolds

(b) Froude

(c) Mach

(d) Cartesian

The question was posed to me during an interview.

This intriguing question originated from Rayleighs Method in portion Dimensional and Model Analysis of Fluid Mechanics

1 Answer

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Best answer
Correct option is (d) Cartesian

Best explanation: Dimensionless numbers are numbers with a dimension of one. It is a pure number. It does not contain any physical unit. No change takes place due to altering of any variable.

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