Which factor influences kinematic viscosity?

Kinematic viscosity is influenced by both dynamic viscosity and density of a fluid. Dynamic viscosity measures a fluid's internal resistance to flow when an external force is applied, while density is the mass per unit volume of the fluid. Kinematic viscosity can be defined as the ratio of dynamic viscosity to density.

This relationship illustrates that changes in either dynamic viscosity or density will affect the kinematic viscosity. For example, if the temperature increases, it typically decreases the dynamic viscosity of most fluids, impacting the kinematic viscosity accordingly.

The other options do not capture the complete relationship influencing kinematic viscosity. While temperature can affect dynamic viscosity, it is not the only factor at play; hence, stating that kinematic viscosity is influenced only by temperature is too limited. Likewise, pressure has a minimal effect on kinematic viscosity for incompressible fluids and is therefore not a primary factor. The amount of fluid in the system does not directly impact kinematic viscosity, as kinematic viscosity is an intrinsic property of the fluid itself rather than a function of the quantity present.