Homework 54 this

墨涟

Nuclear weapons:
& \: A5 E8 Q$ |  P2 Zhttp://nuclearweaponarchive.org/Nwfaq/Nfaq0.html

! n: o5 N1 X8 ]2 kWeapons 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:
<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
0 ^4 c- X) Z" L! M5 o

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>
3 ?) o% Z+ s' z. O
# t1 @& B. f) [0 Q
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:
$ r' T0 N2 Q/ L+ ]5 H<http://find.galegroup.com/gvrl/i ... 925&version=1.0>

# A( H& X9 N4 P: n3 G! ?
% k! \3 n4 Y/ k9 {. O+ D
7 |- t+ I5 t/ ~) g: P& kLerner, 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:
) `/ e$ F8 g% N$ C" O. s+ ~8 l5 j# O) T<http://find.galegroup.com/gvrl/i ... 925&version=1.0>
; }' H; o/ F+ J$ n. N/ b- W
critical mass
n.
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>

<>
1 W6 E3 S! b+ }9 j  m3 X1 o1 v
[ 本帖最后由 墨涟 于 2008-10-24 15:04 编辑 ]