Alkyl Halide Reactions. The functional group of alkyl halides is a carbon-halogen bond, the common halogens being fluorine, chlorine, bromine and iodine. With the exception of iodine, these halogens have electronegativities significantly greater than carbon.
Its been said that most car companies make it so where airbags deploy based on the impact. It is said that the airbag will not deploy until the impact generates 7 G's of force. For most vehicles that speed is equivalent to hitting an object at 12 mph or hitting another vehicle at 25 to 30 mph. It is dependent upon the impact of the crash. Source(s): http://www.aa1car.com/library/airbag01.h...
Beginning with the National Traffic and Motor Vehicle Act of 1966, the United States has required automobiles to have safety features such as seatbelts. By the early 1990s, all new cars sold in the United States were equipped either with automatic seat belts or with air bags that inflate upon impact. In 1973-74 the US Congress, attempting to reduce fatalities and conserve fuel, passed a law making 55 miles per hour (mph) the national maximum speed limit.