Fluids have viscosity because
A) the atoms and molecules within the fluid interact with each other, producing internal frictional forces.
B) the atoms and molecules within the fluid are heavy and hard to push..
C) molecules in fluids are long and get tangled.
D) they are always in contact with some boundary.

Question

Quizplus · Accepted Answer

Viscosity in fluids arises due to the interactions between the atoms and molecules within the fluid, which produce internal frictional forces. These interactions can be due to various forces such as van der Waals forces, dipole-dipole interactions, or hydrogen bonding, depending on the nature of the fluid. This internal friction opposes the motion of the fluid layers relative to each other, leading to the characteristic resistance to flow that defines viscosity.

Fluids Have Viscosity Because