Concept:In streamline flow, every fluid particle passing through a fixed point follows the same path and has the same velocity at that point.
Explanation:A streamline is a curve whose tangent at any point gives the direction of fluid velocity at that point.
In steady streamline flow, the velocity of a particle may change as it moves along the streamline.
However, at any given fixed position, all particles arriving there have the same velocity (magnitude and direction).
This means that the velocity of fluid particles crossing a particular point is constant over time.
Thus, option C is correct, while the other options are not true for a general streamline flow.
Answer:C. The velocity of all fluid particles crossing a given position is constant.
