The coefficient of viscosity for hot air is

As the temperature of water increases,its viscosity

$A$ space $2.5\ cm$ wide between two large plane surfaces is filled with oil. The force required to drag a very thin plate of area $0.5\ m^2$ just midway between the surfaces at a speed of $0.5\ m/s$ is $1\ N$. The coefficient of viscosity in $kg/(m \cdot s)$ is:

$A$ 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.

What is viscous force? On what factors does viscous force depend?

The velocity of the upper layer of water in a river is $36 \, km/h$. The shearing stress between horizontal layers of water is $10^{-3} \, N/m^2$. The depth of the river is $h$. (The coefficient of viscosity of water is $10^{-2} \, Pa \cdot s$). Find the value of $h$ in meters.