Archive for the ‘Fizika’ Category
On August 31st 2012 at 4.36 p.m. EDT a huge filament of solar material that had been hovering in the sun’s corona erupted. Although it wasn’t pointed directly at Earth, it still connected with our magnetosphere and was responsible for the rather stunning aurora that appeared on Monday Sept 3rd.
The Coronal Mass Ejection travelled at over 900 miles per second. This image shows the CME in comparison with a scale image of the Earth (no, smartasses it’s not that close
Wall street Journal objavio je tekst o neopravdanoj panici vezanoj za havariju nuklearke u Fukušimi:
In hindsight, it is hard to resist the conclusion that the policies enacted in the wake of the disaster in Japan?particularly the long-term evacuation of large areas and the virtual termination of the Japanese nuclear power industry?were expressions of panic. I would go further and suggest that these well-intended measures did far more harm than good, not least in limiting the prospects of a source of energy that is safe, abundant and (as compared with its rivals) relatively benign for the environmental health of our planet.
In Fukushima, the area exposed to the greatest radiation?a swath of land some 10 miles wide and 35 miles long?had an estimated first-year dose of more than 2 rem. Some locations recorded doses as high as 22 rem (total exposure before evacuation). Afterward, the levels of radiation dropped quickly; the largest component came from iodine, and its level dropped by 50% every eight days.