How many times is the shearing stress of a fluid compared to the shearing stress of a solid when subjected to the same deformation?

The viscous force between two liquid layers is

In a laminar flow,the velocity of the liquid in contact with the walls of the tube is:

Consider a thin square plate floating on a viscous liquid in a large tank. The height $h$ of the liquid in the tank is much less than the width of the tank. The floating plate is pulled horizontally with a constant velocity $u_0$. Which of the following statements is (are) true?
$(A)$ The resistive force of liquid on the plate is inversely proportional to $h$
$(B)$ The resistive force of liquid on the plate is independent of the area of the plate
$(C)$ The tangential (shear) stress on the floor of the tank increases with $u_0$
$(D)$ The tangential (shear) stress on the plate varies linearly with the viscosity $\eta$ of the liquid

When the temperature increases,the viscosity of

The coefficient of viscosity for hot air is