The viscous force between two liquid layers is

What is the value of the shear modulus of sulfuric acid?

For the situation shown in the figure,water flows on the surface of a fixed plate. The velocity of water as a function of distance $y$ is given as: $u = \alpha \left[ \frac{y}{h} - 2\left( \frac{y}{h} \right)^2 \right]$. Determine the magnitude of the shear stress that the water applies at the base of the plate. The coefficient of viscosity is $\eta$.

Discuss the coefficient of viscosity in terms of stress and strain.

$A$ metal plate of area $10^{-2} \,m^2$ rests on a layer of castor oil, $2 \times 10^{-3} \,m$ thick, whose coefficient of viscosity is $1.55 \,Ns\, m^{-2}$. The approximate horizontal force required to move the plate with a uniform speed of $3 \times 10^{-2} \,ms^{-1}$ is (in $N$)

$A$ metal block of area $0.10 \; m^2$ is connected to a $0.010 \; kg$ mass via a string that passes over an ideal pulley (considered massless and frictionless),as shown in the figure. $A$ liquid with a film thickness of $0.30 \; mm$ is placed between the block and the table. When released,the block moves to the right with a constant speed of $0.085 \; m s^{-1}$. Find the coefficient of viscosity of the liquid.