The mass جحيux is de食ned as density times this quantity's vector 食eld.
In two dimensions, the x and y components of this quantity are set equal to partial derivatives of the stream function, such that the de食nitions satisfy the CauchyÂ–Riemann equations. A partial derivative with respect to time plus "this quantity dot the gradient" de食nes a type of derivative that, depending on the source, is described as "total," "substantial," or "material." A streamline is de食ned as being parallel to the components of this quantity's 食eld, whose line integral around a closed curve de食nes the circulation. The mass جحيux is de食ned as density times this quantity's vector 食eld. Setting the partial time derivative, divergence, or curl of this quantity equal to zero de食nes, respectively, "steady," "incompressible," and "irrotational" جحيows. For 10 points, what quantity's derivative yields a جحيuid's acceleration?
In two dimensions, the x and y components of this quantity are set equal to partial derivatives of the stream function, such that the de食nitions satisfy the CauchyÂ–Riemann equations.
]ow velocity [accept u or vجحي uidجحي