Physics · Fluid Mechanics

Which of the following statements regarding fluid flow lines are true? A. A streak line is a curve connecting all points in the flow along which a fluid particle moves in time. B. Two stream lines can never cross each other. C. For a steady flow, path lines, stream lines, and streak lines coincide. D. The separation between two stream lines is proportional to the velocity. E. Path line and streak line originating from a point in flow can never intersect elsewhere in the flow.