A dimensionless group formed with variables: ρ (mass density), μ (dynamic viscosity), g (gravitational acceleration) and D (characteristic length) is:

\(\frac{{\rm{\mu }}}{{{\rm{\rho g}}{{\rm{D}}^{\frac{3}{2}}}}}\)

\(\frac{{{{\rm{D}}^{\frac{3}{2}}}}}{{{\rm{\rho \mu g}}}}\)

\(\frac{{\rm{\mu }}}{{{\rm{\rho }}{{\rm{g}}^{\frac{1}{2}}}{{\rm{D}}^{\frac{3}{2}}}}}\)

\(\frac{{\rm{\mu }}}{{{{\rm{\rho }}^{\frac{1}{2}}}{\rm{D}}{{\rm{g}}^{\frac{1}{2}}}}}\)

A dimensionless group formed with variables: ρ (mass density), μ (dy

1.	A dimensionless group formed with variables: ρ (mass density), μ (dynamic viscosity), g (gravitational acceleration) and D (characteristic length) is:
A.	\(\frac{{{{\rm{D}}^{\frac{3}{2}}}}}{{{\rm{\rho \mu g}}}}\)
B.	\(\frac{{\rm{\mu }}}{{{\rm{\rho }}{{\rm{g}}^{\frac{1}{2}}}{{\rm{D}}^{\frac{3}{2}}}}}\)
C.	\(\frac{{\rm{\mu }}}{{{\rm{\rho g}}{{\rm{D}}^{\frac{3}{2}}}}}\)
D.	\(\frac{{\rm{\mu }}}{{{{\rm{\rho }}^{\frac{1}{2}}}{\rm{D}}{{\rm{g}}^{\frac{1}{2}}}}}\)
Answer» C. \(\frac{{\rm{\mu }}}{{{\rm{\rho g}}{{\rm{D}}^{\frac{3}{2}}}}}\)