Flow rate: Water flows through a pipe having a varying width. More water flows per second through the wide section than through the narrow section because there is more room for it to flow.

Question

Quizplus · Accepted Answer

The flow rate (volume of water flowing per second) remains constant throughout the pipe regardless of changes in width; what changes is the velocity of the water, which is faster in narrower sections to maintain the constant flow rate.

Flow Rate: Water Flows Through a Pipe Having a Varying