Homework 54 this

墨涟

Nuclear weapons:
& V6 ]3 z* K8 J8 D) Zhttp://nuclearweaponarchive.org/Nwfaq/Nfaq0.html
% ]9 }! N: Q# X$ G/ A6 o
  K" [+ h# b5 |4 v! g" o' _Weapons of Mass Destruction. (2003). In Harvey Kushner (Ed.), Encyclopedia of Terrorism, Vol. 1. (404-406). Thousand Oaks: Sage Reference. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
- F  I; ^5 I# g<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
7 h" p  ^( s# q% v' o) w9 F4 d
# O* b& m2 q& Y5 u. D5 f9 B- N
Nuclear Weapons. (2006). Encyclopedia of Modern Europe: Europe Since 1914: Encyclopedia of the Age of War and Reconstruction, Vol. 4. (1891-1898). Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
" P7 {8 M4 k: N

Clark, Roger. (2005). Nuclear Weapons. In Dinah Shelton (Ed.), Encyclopedia of Genocide and Crimes Against Humanity, Vol. 2. (754-761). Detroit: Macmillan Reference USA. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
% }1 ?. |  w  U* f0 I  M2 F/ I3 a<http://find.galegroup.com/gvrl/i ... 925&version=1.0>



# e( Y4 @' j" k, c, BLerner, K. Lee, Gilman, Larry, & Haycock, Dean Allen. (2004). Nuclear Weapons. In K. Lee Lerner & Brenda Lerner (Eds.), Gale Encyclopedia of Science, Vol. 4. (3rd ed., 2816-2821). Detroit: Gale. Retrieved October 22, 2008,  from Gale Virtual Reference Library via Gale:
6 u  ^  v; X9 E% B: t& Q<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
% T  h+ [% p3 u' q9 |+ _3 ]
) U6 f! l3 ?8 X3 X+ Ycritical mass
+ ~3 [# Y, t% |; _n.
0 s  X, Q# `; y! k& F5 `1. The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.
2. The amount of matter needed to generate sufficient gravitational force to halt the current expansion of the universe
<http://www.thefreedictionary.com/critical+mass>

<>

[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ]