With a flow of 4L/min and a reservoir level of 1L, what will be the reaction time?

To determine the reaction time in this scenario, it's essential to understand the relationship between flow rate, reservoir level, and the time it takes for that reservoir to be depleted at a given flow rate.

The flow rate is given as 4 liters per minute, which can be converted into seconds for more precise calculations. Since there are 60 seconds in a minute, a flow rate of 4 liters per minute translates to approximately 0.067 liters per second (4L/60s).

With a reservoir level of 1 liter, you can calculate the time it would take to deplete this volume at the flow rate. Using the formula:

Time = Volume / Flow Rate

Substituting the given values:

Time = 1 liter / 0.067 liters per second ≈ 14.93 seconds.

When rounded, this value is approximately 15 seconds. Therefore, the reaction time in this scenario is effectively understood as the duration it would take to empty the reservoir entirely at a constant flow rate of 4 liters per minute. This reasoning aligns with the chosen answer.