The ratio of the activity of the SLRDs to the activity of the radon gas is called the Equilibration Ratio (ER). Equilibrium usually occurs in about three to four hours. When an individual receives a dose of one WL in 170 hours (a miner's month), the exposure then becomes called a working level month or WLM.
I imagine it was probably my first Prehospital Trauma Life Support class back in 1990 that I first heard of the three collision rule. Since then, it has remained a useful tool in examining the mechanism of injury after auto accidents. If you havenât heard of it, please allow me to elaborate. The three collision rule states that, in any auto accident, there are three collisions that occur and the keen EMT needs to be aware of all three.
The most common question in issues involving vehicular fatalities is how many driving accident occur each year? According to the National Highway Traffic Administration, car accidents happen every minute of the day. Motor vehicle accidents occur in any part of the world every 60 seconds. And if itâs all summed up in a yearly basis,there are 5.25 million driving accidents that take place per year. Statistics show that each year,43,000 or more of the United Statesâ population die due to vehicular accidents and around 2.9 million people end up suffering light or severe injuries. In a certain five year period, there had been recorded a 25% of the driving population who encountered or were involved in car accidents.