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Air Bags

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Submitted By charleyd9
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The Truth Behind Airbags
To explain what an airbag is to someone, one would simply say it is a bag that inflates during a car crash to save someone's life. But to dig deeper, what is the science behind an airbag and does it always work?
An airbag is a nylon bag in the steering wheel of a vehicle. When the censor in the steering wheel goes off that an accident has happened, the airbag inflates within two milliseconds. Within the nylon bag, there is a mixture of sodium azide (NaN3), and potassium nitrate (KNO3), that react when the airbag sensor goes off (Brian). This reaction causes an explosion, “[filling] the airbag with about 67 liters of nitrogen gas- which is enough to inflate a normal air bag” (Scientific America). Theoretically, in the right amount, this will inflate the airbag to the right amount to save the person's life. However, this is just theoretically. In some instances, the airbag may inflate too much or too little, and fail to save a life. Although the scientists that design the airbags use ut-most caution, not every experiment will turn out the same and inflate the airbag perfectly. In an experiment conducted here at "Charley's Newspapers" we stimulated the reaction between baking soda and vinegar by blowing up a plastic bag that was designed to save an egg. This was to get a feel on how accurate an airbag may be. Using very precise stoichiometry, our scientists here had found that .8 grams of baking soda and 11 mL of vinegar should theoretically blow the plastic bag up enough to save the egg's life. However, when the experiment was conducted, those measurements of both the baking soda and vinegar surprisingly barely inflated the bag. Our next few trials indicated that more of both chemicals were needed to perfectly inflate the bag to save the egg's life. These experiments conducted by our team here at "Charley's Newspapers" represent the process that airbag factories must go through to make sure every airbag is on the right track to save a life.

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