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Current Events -- week of March 11- 19
Supermoon March 18
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Earthquakes and Tsunamis
Recent major earthquakes -- Haiti, Chile, New Zealand, -- Japan Haiti – Jan Chile -- Feb 27, New Zealand – Sep 3, 2010 – 7.2 Japan - Mar 11– 8.9
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Nuclear Power and Radiation
Fission Fusion
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What is this “radiation” ?
Is it electromagnetic ? Some gamma rays released but most is radioactive particles -- neutrons and daughter products – nuclei
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Everyday sources of radiation
Unit of measurement – Sievert m = milli = 0.001 m = micro = Everyday sources of radiation Natural /year Cosmic (avg) mSv Earth crust mSv Radon mSv Food & drink mSv Total mSv Artificial chest CT scan mSv mammogram mSv NYC LA flight m Sv Flight crews mSv/yr 50 km of nuclear plant mSv/yr 50 km coal plant mSv/yr Increased cancer risk mSv/yr Fukishima workers mSv/yr
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Increased cancer risk >100mSv/yr Fukishima workers 250mSv
Dose limit radiation poisoning mSv short term Severe radiation poisoning mSv = 2Sv short term Fatal Sv 3 Mile Island -- avg total dose was 80mSv within 10 mi ! California -- 3/19 < 1mSv from Fukushima fallout Has the US Media exaggerated the risk? --- YES SEE for a good illustration For comparative radiation levels around the world see also ----
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From http://www. weathertrends360
And if you smoke see
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