# Recent content by dx+dy

1. ### Curl and div operators

The physics interpretation of divergence and curl,it is possible to be seen very fast going to an infinitesimal cube. In Cartesian coordinates, supposing an infinitesimal cube, trim in the origin, we can serve to us as the differential of the field to see its meaning: \ \vec{\nabla} \cdot...
2. ### Differences between delta W or dW

Why in some sites, the work appears like \ \ \delta W instead of dW ? Whats the differences between \ \delta W and dW? thanks
3. ### Fluid Mechanics question,velocity potential

Compound functions always was my nightmare \frac{\partial}{\partial t} \left(\frac{\partial \Omega}{\partial x}\right)=\frac{\partial}{\partial x} \left(\frac{\partial \Omega}{\partial x}\right) \underbrace{\frac{dx}{dt}}_{u}+\frac{\partial}{\partial y} \left(\frac{\partial...
4. ### Fluid Mechanics question,velocity potential

I am new in this place, am studying civil engineering in Spain,Madrid, and is something I do not understand in a theoretical exposition of the velocity/force potential. They suppose that the external force that it acts in each point of the fluid and the speed, derive from scalar , so they...