Yes, Japan like all other countries will have radioactivity. But not as much as say Chernobyl, or even Bikini Atoll.
No.
The specific radioactivity of polonium-210 is 4,5.10E3 Curies.
During the earthquake in Japan, a tsunami was created, thousands of homes were destroyed, and one of the nuclear power plants was badly damaged, spreading its radioactivity.
Not sure what the question is asking but yes there is little radioactivity in cell phones and TVs car pretty much anything electronics.
Probably to the Bible Belt area of the USA. Ending at Texas or maybe Louisiana if the wind is blowing.
Radioactivity affect the water molecules. Radioactivity makes it harmful
most of the bombing of Japanese cities was mass firebombing with conventional incendiary bombs, no radioactivity was involvedthe radioactive fallout of the atomic bombs dropped on hiroshima and nagasaki did not disburse much further than a few miles away from the cities, even within the two cities themselves the residual radioactivity was not high enough to cause any acute illness and both cities were soon repopulated immediately after the end of the war (US occupation troops were also stationed in both cities and lived in barracks within the cities)
What other sort of radioactivity is there?
For example natural and artificial radioactivity.
Radioactivity can be induced in ordinary matter by artificial transmutation.
You cannot measure radioactivity in litres