किस प्रकार के द्रव प्रवाह में धारा रेखा (streamline), पथ रेखा (pathline), और स्ट्रीक रेखा (streakline) पूर्णतः एक समान होती हैं?

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?