英语assessment task:Moving About

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英语assessment task:Moving About
我要写关于seat bell(安全带)得
用英文,大概500words左右
内容要包括:attach suiable references and diagrams
可以写其他,例如:brade,air bag
这篇东西是关于物理得

How Air Bags Work
To have a frontal (driver or passenger) air bag deploy, certain criteria must be met. One of these criteria is that the frontal impact must be within a 60-degree window, occurring within 30 degrees from the vehicle's centerline. Another key element is that the crash forces are equivalent to a head-on collision with an immovable barrier at 10-15 miles per hour. Because a typical automobile accident only lasts about 0.125 (1/8th) of a second, air bags deploy within 15 to 20ms after the initial crash impact. To create a protective cushion between the occupant and the vehicle's interior, the air bag inflates at speeds up to 200 mph within approximately 30ms after impact. This allows the occupant to contact a fully inflated bag within approximately 45 to 50ms after the initial crash impact. Approximately 100ms after impact the bag deflates.不够具体的话可以去下面的网站

Sports,Lifestyle and Recreation assessment task. 快乐的大脚英语评价Happy Feet is about a very moving story, the story 英语:fast moving colors Why was she scared about moving解答 He is moving about in his office?. task Moving 简历求翻译Self-assessment,求各位英语大神鼎力相助 1、 You should spend about 40 minutes on this task. people must think about the problems before before moving. 初二上英语unit1 task翻译 self assessment