Which of the following is not a dimensionless group?

1.	Which of the following is not a dimensionless group?
A.	\[\frac{\Delta \,p}{\rho \,{{N}^{2}}{{D}^{2}}}\]
B.	\[\frac{g\,H}{{{N}^{2}}\,{{D}^{2}}}\]
C.	The flow is irrotational
D.	\[\frac{\Delta \,p}{\rho \,{{V}^{3}}}\]
Answer» E.

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Which of the following is not a dimensionless group?

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