Final answer:
The Level 3 Compressed Air System in NFPA 99 of 2005 refers to engineering standards for medical gases, with applications of compressibility seen in scuba diving, vehicle airbags, and industrial agriculture.
Step-by-step explanation:
The Level 3 Compressed Air System mentioned in NFPA 99 of 2005 pertains to engineering standards related to medical gas systems, including those used for breathing air in healthcare environments. In everyday life, compressibility of gases is utilized in numerous applications such as in scuba diving, where divers carry tanks of compressed air to breathe underwater, and vehicle safety devices like airbags which inflate rapidly during a collision by means of a chemical reaction.
The chemistry of compressed gases is also critical to industrial agriculture, where substances like NH₃ (ammonia) are stored under pressure. Understanding the behavior of gases under compression is important for ensuring the safe and effective use of such systems, whether it's for recreational, medical, or industrial purposes.