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  1. 每個所提及到的 safety device 皆需配合 Newton's first law of motion 來解釋的: ...

  2. 1. Since impulsive force=change in momentum/impact time, the air bags and bumpers are used to increase the impact time and hence reduce the implusive force acting on the occupants. 2. It is also used to increase the impact time and hence reduce the force...

  3. ...consumer products General Product Safety Directive – A directive on general ... EN 71-3:1994 + A1:2000 Safety of Toys, Migration of Certain...

  4. ...additional neutrons for sustaining the fission reaction. 2. What safety process are there? Fission reaction is carried out in fuel...

  5. ...conical flask = 錐形瓶 5. reagent bottle = 試劑瓶 6. heat-proof mat = 隔熱墊 7. safety spectacles = 安全眼鏡 8. tongs = 鉗子 9. glass rod = 玻璃棒...

  6. ...normal reaction(100N),on the child.So the force exerted by the safety seat on the child should be the resultant force of the noraml reaction and the force F...

  7. ... several problems. First, doubling the current will cause safety problem. Second, the voltage and current are related by the formula...

  8. I THINK THEIR SERVICE AND SAFETY IS BETTER THAN KOREAN AIRLINE (AT...

  9. 1. where did you copy this from? seems some mistake 2. Civil aviation and safety authority (CASA) is oz. Nothing to do with hkg wor.

  10. ...reaction time. 2.It shows the reason why we need to prepare some ' safety time' and ' safety space' 3.It shows a brief idea...