The atomic bomb uses energy released by nuclear fission of uranium and plutonium, and generate far more destruction than they can produce conventional explosive.
The bomb dropped on Hiroshima was about 3 feet long and weighed about 4 tons, for its length and its shape has been given the name "Little Boy (boy)."
The bomb was carrying about 50 kilograms of uranium -235, but the instantaneous fission products with less than 1 kg of high energy quest'uranio can leave, the 50x100 of this energy was released in the form of wind explosive (blast wave), the form of heat rays 35xcento 15x100 and the remainder in the form of radiation.
The overall effects of these three factors have caused enormous damage.
The intense heat rays and explosive violent wind destroyed and burned almost all buildings within a radius of 2 km dall'ipocentro explosion.
Towards the end of December 1945, when he finally had decreased the maximum effect of the initial radiation, the bomb had wiped out at least 140,000 human humans.
Damage caused by heat rays
instant detonation of the internal temperature at the point of explosion exceeded a million degrees centigrade and has generated a huge fireball.
After a second the ball has grown to 280 m in diameter. Its surface temperature has reached 5000 degrees Celsius and the ball has been irradiated the intense heat rays which caused massive damage.
Damage caused by the violent wind explosive
At the time of detonation at the center has created an extremely high pressure of several hundred thousand times atmospheric pressure.
The air around was furiously pushed outward resulting in a violent blast.
500 meters dall'ipocentro the pressure reached was something like 15 tonnes per square meter. This has crushed almost all the buildings and people thrown into the air.
damage caused by radiation
The episodes are typical of the atomic bombing of the serious problems went to the human body caused by radioactive rays that can not in any way be generated by conventional bombs.
In particular, people who are within 1 km dall'ipocentro have been lethal, and most of them died within a few days.
The acute effects, occurred after a short period from exposure radiation, causing various symptoms such as febrile, nausea, diarrhea, bleeding, hair loss and fatigue. So many people have died.
The late effects began to appear 2 or 3 years and sometimes even 10 years later, and occurred in the form of keloid, leukemia and other cancers. These diseases still afflict many victims of the atomic bomb.
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