Final answer:
The factored expression rr^2 - r^3 simplifies to zero, indicating no flow or a negligible flow rate, which is relevant in the study of fluid dynamics in pipeline systems as per Poiseuille's law.
Step-by-step explanation:
The expression rr2 - r3 in the context of pipeline flow can be factored to r2(r - r). However, since r - r equals zero, this implies that the factored expression simplifies to zero, which suggests that there is no pipe flow or that the flow rate is being considered negligible. This concept is related to the fluid dynamics in pipeline systems, where the radius of the pipe (r) is a critical factor in determining the flow rate and resistance within the system, as described by Poiseuille's law.