ANS:A - m²/sec

the unit of kinematic viscosity. Kinematic viscosity is a measure of how easily a fluid flows and is defined as the ratio of dynamic viscosity (μ) to the density (ρ) of the fluid. In the SI (International System of Units), dynamic viscosity is measured in Pa⋅sPa⋅s (Pascal seconds) or N⋅s/m^2 (Newton seconds per square meter), and density is measured in kg/m^3 (kilograms per cubic meter). The unit  m^2 / sec can be understood as follows:

• m^2 represents the unit of area, indicating the cross-sectional area through which fluid flows.
• sec represents the unit of time, indicating the duration over which the fluid flows through the given area.

Thus, m^2/sec signifies the rate of flow of a fluid through a unit area over a unit time interval. It quantifies how quickly the fluid is moving through a specific area, normalized by its density. In essence, kinematic viscosity measures how fast momentum is transferred in a fluid due to the velocity gradients within the fluid. Higher kinematic viscosity implies slower momentum transfer, while lower kinematic viscosity implies faster momentum transfer within the fluid.