railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Physics Units and Dimensional Formula
Which of the following is the definition of a fluid's coefficient of viscosity (pronounced 'eta')?
1
Shearing stress to strain rate ratio
2
the ratio of shearing stress to the velocity gradient of the fluid.
3
The ratio of shearing stress to fluid density
4
The ratio of shearing stress to fluid weight