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Post by marchesarosa on Jun 4, 2012 18:48:24 GMT 1
LFTRS
I have just spent 2 hours watching a fascinating and wide ranging discussion of the history of nuclear energy and where the West went wrong presented by Kurt Sorensen
Very informative, engaging, enthusiastic presentation covering a wide range of energy related issues.
Watch it yourselves and recommend it to your friends!
I recommend it as time very well spent!
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Post by marchesarosa on Jun 19, 2012 20:10:14 GMT 1
Perhaps someone in the know could explain about the "half-life" of radioactive substances?
The man who made this video said the shorter the "half life" the more dangerous the level of radiation emitted and the longer the half life the less dangerous. At least, I think that is what he said. What did he mean?
He implied that an element with a half-life of only one day was extremely toxic (if toxic is the right word).
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Post by principled on Jun 21, 2012 10:45:32 GMT 1
That made me wonder as well, Marchesa. I can only make sense of it by using following analogy (not very good, but...) We have two flammable substances that contain the same amount of energy, one (A) burns slowly, the other (B) burns fast. If we ignite both, then obviously B will radiate more heat (energy) than A, although over a shorter period. If we liken A to long half life, and B to short half life, his argument seems to make sense. From Wiki: See also: wiki.answers.com/Q/If_the_half-_life_of_an_radioactive_isotope_is_shorter_is_it_more_or_less_dangerous |
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