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There are two flasks,  labelled A and B  A  tastes like water and will not immediately harm you if you drink it. However, if you drink more than a litre of it, you have a 1 in 4 chance, in five years’ time, of developing a terrible liver disease that will kill you. B  tastes ghastly. If you drink one mouthful it will kill you painlessly in 5 minutes.    Which is more dangerous? Why?
Things to think about  You probably think that B was the most dangerous as it would definitely kill you. However, the source would be rapidly identified and nobody else would die.  Flask A could go on killing people for many years as it would be very difficult to find the cause 5 years later.  This is the problem with medical research. Many people claim that mobile phones can cause illness. Proving this link (one way or the other) is extremely difficult.
Lesson 8 Mobile Phones and Health
You will be successful if you can:   ,[object Object],[object Object],[object Object],[object Object]
Activity ,[object Object],[object Object],[object Object],[object Object],[object Object]
How Safe? - Activity
How Safe? - Activity ,[object Object],[object Object]
 

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L8

  • 1. There are two flasks, labelled A and B A tastes like water and will not immediately harm you if you drink it. However, if you drink more than a litre of it, you have a 1 in 4 chance, in five years’ time, of developing a terrible liver disease that will kill you. B tastes ghastly. If you drink one mouthful it will kill you painlessly in 5 minutes.   Which is more dangerous? Why?
  • 2. Things to think about You probably think that B was the most dangerous as it would definitely kill you. However, the source would be rapidly identified and nobody else would die. Flask A could go on killing people for many years as it would be very difficult to find the cause 5 years later. This is the problem with medical research. Many people claim that mobile phones can cause illness. Proving this link (one way or the other) is extremely difficult.
  • 3. Lesson 8 Mobile Phones and Health
  • 4.
  • 5.
  • 6. How Safe? - Activity
  • 7.
  • 8.