Question

Determine the viscosity of a liquid having kinematic viscosity 6 stokes and specific gravity 2.0

Answer 1

Specific gravity

$$S(for\ liquids)=\dfrac{\rho_L}{\rho_{H_2O}}$$

Density of water $\rho_{H_2O}=1000kg/m^3$

Given $S=2.0, \nu_L=6St=6\times10^{-4}m^2/s$

Use the relation

$$\nu_L=\dfrac{\mu_L}{\rho_L}$$

$$\mu_L=\nu_L\cdot\rho_L=\nu_L\cdot S\cdot\rho_{H_2O}$$

$$\mu_L=6\times10^{-4}m^2/s\cdot2\cdot1000kg/m^3=$$

$$=1.2Ns/m^2=12\text{ poise}$$