Airbags

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by GlogpediaGlogs
Last updated 5 years ago

Discipline:
Science
Subject:
Chemistry

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Airbags

-When gases expand into a small volume quickly the temperature increases. this was casuing early users of the airbags to become burned and they expanded too quickly casuing bruises and further injuries. + however it is in todays thriving technologies and further studies of the gas laws that air bags are now safer and, due to adding new substances the bags expand in a cooler and slower manner.

A blast of nitrogen creats a cushion of air due to the expanding bag and, according to the gas laws when the volume is decreased the preasure within the container is increased

how do they work?

Sodium azide is best known as the chemical found in automobile airbags. An electrical charge triggered by automobile impact causes sodium azide to explode and convert to nitrogen gas inside the airbag. Sodium azide is a rapidly acting, potentially deadly chemical that exists as an odorless white solid. (http://www.bt.cdc.gov/agent/sodiumazide/basics/facts.asp)

sodium azide

Airbags BY andrew menteer

+/- of air bags

thanks to this website for information

1 the forces in a airbag can be equal to 2000 ibs2The powdery starch or talcum substance released when air bags deploy contains sodium hydroxide,3due to the large amount of preasure being put into a small area the temperature of airbags is high. 4From 1987 to 2012, there were an estimated 39,976 lives saved by frontal air bags.5The airbag's inflation system reacts sodium azide (NaN3) with potassium nitrate (KNO3) to produce nitrogen gas. Hot blasts of the nitrogen inflate the airbag.6When all passenger vehicles are equipped with air bags, it is expected that more than 3,000 lives will be saved each year7The air bag is inflated at speeds up to 200 miles per hour. This faster than the blink of an eye.

facts

Video of how airbags work: http://www.safercar.gov/Vehicle+Shoppers/Air+Bags/After+Deployment


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