निम्नलिखित में से कौन सा अक्षीय प्रवाह पंप (axial flow pump) का एक प्रमुख लाभ 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?