Question

define coefficient of viscosity.write its si unit

Answer 1

Coefficient of viscosity is the degree to which a fluid resists flow under a force that is applied and it's expressed as the ratio of the shearing stress to the gradient's velocity.

Viscosity in liquid decreases as temperatures increase because molecular bonds are weakened by increase in temperature.

The SI unit for viscosity is:N.s/m2

Answer 2

Coefficient of viscosity is the degree to which a fluid resists flow under an applied force. It is expressed as the ratio of the shearing stress to the velocity gradient. As the temperature increases the coefficient of viscosity of liquids decreases because the bonds between molecules are weakened.

The physical unit of dynamic viscosity in SI units, the poiseuille, and cgs units, the poise are named after Jean Leonard Marie Poiseuille. The poiseuille is equivalent to the pascal second (Pa.s), or (N.s) / m2 or kg / (m.s)