If p is the density and $\eta$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number Re is :

Question

If p is the density and $\eta$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number R_e is :

${R_e} = {{\eta d} \over {\rho v}}$

${R_e} = {{\rho v} \over {\eta d}}$

${R_e} = {{\rho vd} \over \eta }$

${R_e} = {\eta \over {\rho vd}}$

Solution

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