Flow rate is equal to volume divided by __________.

Flow rate is a measure of the volume of fluid that passes through a given point over a specified period of time. Therefore, flow rate can be mathematically expressed as the volume of fluid divided by the time it takes for that volume to pass. This relationship shows how quickly the fluid is moving through a system, which is essential for understanding and managing fluid dynamics in various applications, such as in plumbing systems, engines, or industrial processes.

Volume represents how much fluid is present, while time provides the context for how quickly that volume is moving. Thus, the correct answer reflects the fundamental definition of flow rate.