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Miles away! :)
There is no 'safe' distance. Factors such as depth and tide need to be considered.
Tornadoes have varying intensities therefore the safe distance varies also.
Nowhere on the planet is 'safe' from any super-volcano explosion anywhere. The last one of these events eliminated the dinosaurs from all over the earth.
you need at least 20ng to visualize it on an agarose gel along with EtBr or GR safe
We do not know for sure, but if you're worried about the "supposed" supernova explosion of this star in 2012, I assure you it will remain at around 640 light-years away from us, which is certainly a safe distance.
Miles away! :)
10 ft.
300 Meters
600 feet
2
300 meters
About 50 to 100 light-years as the closest safe distance between Earth and a supernova. But, if a supernova to go off within about 30 light-years of us, that would lead to major effects on the Earth, possibly mass extinctions.
yes
21ft
The external irradiation from depleted uranium is not significative.
Actually, 2 seconds is NOT a safe following distance. Minimum safe following distance is 5 seconds. Yes, it works at any legal speed in dry weather.