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Nuclear Bomb Explosion Nuclear Weapon Хробостова Катя, ПМФ-28 Преподаватель – Юрьева Анна Валентиновна
At present nuclear detonations are the most devastating of the weapons of mass destruction.
The enormous toll in destruction, death, injury, and sickness produced by the explosions at Hiroshima and, three days later, at Nagasaki was on a scale never before produced by any single weapon.
In the decades since 1945, even as many countries have developed nuclear weapons of far greater strength than those used against the Japanese cities, concerns about the dreadful effects of such weapons have driven governments to negotiate arms control agreements such as the Nuclear Test-Ban Treaty of 1963 and the Treaty on the Non-proliferation of Nuclear Weapons of 1968.
Because of the tremendous amounts of energy liberated per unit mass in a nuclear detonation, temperatures of several tens of million degrees centigrade develop in the immediate area of the detonation.
Immediately upon formation, the fireball begins to grow rapidly and rise like a hot air balloon.
Within a millisecond after detonation, the diameter of the fireball from one megaton (Mt) air burst is 150m. This increases to a maximum of 2200 m within 10 seconds, at which time the fireball is also rising at the rate of 100 m/sec.
. The combination of the upward movement and the cooling of the fireball gives rise to the formation of the characteristic mushroom-shaped cloud.
Following an air burst, condensed droplets of water give it a typical white cloudlike appearance.