Final answer:
The question deals with a fireworks show where the time between fireworks follows a uniform distribution between one and five seconds, demonstrating a concept from statistics.
Step-by-step explanation:
The student's question regarding the time between fireworks in a show suggests a concept from statistics, specifically focusing on uniform distribution. In uniform distribution, every interval of time within the specified range has an equal probability of occurrence.
If a fireworks show has been designed so that the time between fireworks is between one and five seconds, it means the time can be any value within that range, and no specific time interval is more likely than another.
Calculating probabilities in uniform distribution scenarios involves knowing the range of possible values. Given that the range here is from one to five seconds, we can calculate different probabilities based on this information.
For example, finding the probability that there will be at least three seconds between fireworks, or the average time expected between fireworks, could be problems based on this scenario.
The correct answer is option 4: exceed 1 kg/s. Class B fires involve flammable liquids, gases, or greases. To effectively extinguish a Class B fire, the discharge rate of the fire suppression system should be greater than 1 kilogram per second (1 kg/s).
For example, a carbon dioxide (CO2) fire extinguisher has a discharge rate of approximately 1.3 kg/s, making it suitable for Class B fires.
It is crucial to use the appropriate extinguishing agent for Class B fires to prevent re-ignition and ensure the safety of individuals and property.