Question

if stokes law's is applicable, then what is the Reynolds number.?

Answer 1

Stokes' Law is only valid for non-turbulent flow, so Reynolds number for the falling ball viscometer was also determined. Stokes' Law is a proposition that relates the drag force experienced by a falling sphere to the sphere's (constant) velocity in a liquid of known viscosity.

Answer 2

here

By equating the experimental drag force to the theoretical Stokes’ drag force and rearranging, we were able to determine the experimental viscosity of the glycerin: