The SI unit for measuring viscosity is ___ and can also be expressed as pascal-second.

Newton-second per square meter (N·s/m²)

True or False: Viscosity increases in liquids as the temperature rises.

False. Viscosity decreases in liquids when the temperature rises.

How does pressure typically affect the viscosity of liquids?

Pressure usually has minimal effect on the viscosity of liquids and is often ignored.

Fill in the blank: The inverse of viscosity is ___.

Fluidity

What distinguishes Newtonian fluids from Non-Newtonian fluids in terms of viscosity?

Non-Newtonian: viscosity changes with shear rate.

The viscosity of water at 20 °C is approximately ___ centipoise.

1.0 centipoise (cP)

True or False: Shear-thinning fluids become less viscous as the shear strain rate increases.

True.

What effect does heating a liquid have on its viscosity?

Heating a liquid generally reduces its viscosity by allowing the molecules to move past each other more easily.

Fill in the blank: A rheometer is used to measure the ___ of fluids.

Viscosity

Describe the behavior of thixotropic fluids when they are shaken or stirred.

Thixotropic fluids have a viscosity that decreases when shaken or stirred.

What are Bingham plastics, and how do they behave under stress?

Bingham plastics behave as solids under normal conditions but flow as viscous liquids when subjected to high stress.

Fill in the blank: The viscosity of gases generally ___ as temperature increases.

Increases