Final answer:
The question is about two-dimensional incompressible flow and the concept of flow rate and velocity. It is a high school physics topic.
Step-by-step explanation:
The given question is related to two-dimensional incompressible flow in physics. In this case, we have a velocity field defined as V=(x2−y2+x)i−(2xy+y)j.
Additionally, the concept of flow rate and velocity are relevant. Flow rate and velocity are related by the equation Q = AU, where A is the cross-sectional area of the flow and U is its average velocity.
This topic is studied in high school physics courses.