ऑरिफिस-प्रकार विस्कोमीटर (Orifice type viscometer) का उपयोग प्रयोग में तरल के किस गुण को ज्ञात करने के लिए किया जाता है?

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?