نام فایل : سلاح هسته اي انگليسي

فرمت : .doc

تعداد صفحه/اسلاید : 4

حجم : 61 کیلوبایت

Nuclear weapon
A
nuclear weapon
is an explosive device that derives its destructive force from
nuclear reactions
, either
fission
or a combination of fission and
fusion
. Both reactions release vast quantities of energy from relatively small amounts of matter; a modern thermonuclear weapon weighing little more than a thousand kilograms can produce an explosion comparable to the detonation of more than a billion kilograms of conventional high explosive.
[1]
Even small nuclear devices can devastate a city. Nuclear weapons are considered
weapons of mass destruction
, and their use and control has been a major aspect of international policy since their debut.
In the history of warfare only two nuclear weapons have been detonated offensively, both near the end of
World War II
. The first was detonated on the morning of 6 August 1945, when the
United States
dropped a
uranium
gun-type device code-named "
Little Boy
" on the
Japanese
city of
...