The relationship between Manning's roughness coefficient (η) and Chezy's coefficient (C) is given by which of the following expressions? (where R is the hydraulic radius)

The ratio of the specific weight of a liquid to the specific weight of a standard fluid is known as:

The magnitude of the buoyant force depends on the _____________.

In incompressible fluid dynamics, the continuity equation is ∂u/∂x + ∂v/∂y + ∂w/∂z = 0. What physical law does this equation represent?