## Viscosity

Does anyone know equations that can be used to equate fluid viscosity using the terminal velocity of a mass falling down a tube of that liquid?

Thanks
 PhysOrg.com physics news on PhysOrg.com >> Kenneth Wilson, Nobel winner for physics, dies>> Two collider research teams find evidence of new particle Zc(3900)>> Scientists make first direct images of topological insulator's edge currents

Recognitions:
Homework Help
$$v_{t} = \frac{mg}{6\pi R\eta}$$
where $\eta$ is the viscosity of the fluid. This is derived from Stokes' Law.