Look up: Critical-Mass

1. 
   Critical Mass
   The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.
   Found on http://home.nas.net/~dbc/cic_hamilton/di
   
   
2. 
   Critical Mass
   The minimum mass of a substance that will allow a chain reaction to continue without dying out. See also: Chain Reaction.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
3. 
   Critical mass
   The smallest mass of fissile material that will support a self-sustaining chain reaction under specified conditions
   Found on http://www.world-nuclear.org/info/inf51.
   
   
4. 
   Critical Mass
   The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.
   Found on http://www.allchemicals.info/index/actio
   
   
5. 
   critical mass
   Critical mass is the minimum mass of a fissionable material (235U or 239Pu) that will initiate an uncontrolled chain reaction as in an atomic bomb. The critical mass of pure 239Pu is about 4.5 kg, and of 235U about 15 kg.
   Found on http://www.ktf-split.hr/periodni/en/abc/
   
   
6. 
   Critical mass
   The smallest mass of fissile material that will support a self-sustaining chain reaction under specified conditions.
   Found on http://www.energy-choices.com/index.php?
   
   
7. 
   Critical Mass
   The smallest mass of fissile material that will support a self-sustaining chain reaction under specified conditions.
   Found on http://www.theiet.org/factfiles/energy/n
   
   
8. 
   critical mass
   In physics, the minimum amount of fissionable material required to sustain a chain reaction. Of a software product, describes a condition of the software such that fixing one bug introduces one plus epsilon bugs. (This malady has many causes: creeping featurism, ports to too many disparate environments, poor initial design, etc.) When software a...
   Found on
   
   
9. 
   critical mass
   <chemistry, radiobiology> The minimum amount of mass of a combination of radioactive substances needed for the substances to generate and lose an exactly balanced number of neutrons to make a chain reaction which will keep going by itself. ... (09 Oct 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
10. 
    critical mass
    noun the minimum mass of fissionable material that can sustain a chain reaction
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
11. 
    Critical Mass
    `Critical Mass` is an event typically held on the last Friday of every month in cities around the world where bicyclists and, less frequently, unicyclists, skateboarders, inline skaters, roller skaters and other self-propelled commuters take to the streets `en masse`. While the ride was originally founded with the idea of drawing attention to how unfriendly the city was to bicyclists, the leaderless structure of Critical Mass makes it impossible ...
    Found on http://en.wikipedia.org/wiki/Critical_Ma
    
    
12. 
    Critical mass
    A `critical mass` is the smallest amount of fissile material needed for a sustained nuclear chain reaction. The critical mass of a fissionable material depends upon its nuclear properties (e.g. the nuclear fission cross-section), its density, its shape and its enrichment.
    Found on http://en.wikipedia.org/wiki/Critical_ma
    
    
13. 
    critical mass
    in nuclear physics, the minimum amount of a given fissile material necessary to achieve a self-sustaining fission chain reaction under stated ... [3 related articles]
    Found on http://www.britannica.com/eb/a-z/c/159
    
    
14. 
    Critical Mass
    The smallest mass of fissile material that will support a self-sustaining chain reaction under specified conditions.
    Found on http://www.sea-us.org.au/glossary.html
    
    
15. 
    critical mass
    minimum mass of fissile material which can be made critical with a specified geometrical arrangement and material composition
    Found on http://www.electropedia.org/iev/iev.nsf/
    
    
16. 
    critical mass
    The minimum mass of a fissionable material (²³⁵U or ²³⁹Pu) that will initiate an uncontrolled chain reaction as in an atomic bomb. The critical mass of pure ²³⁹Pu is about 4.5 kg, and of ²³⁵U about 15 kg.
    Found on http://www.daviddarling.info/encyclopedi
    
    
17. 
    critical mass
    critical mass: see chain reaction.
    Found on http://www.infoplease.com/ce6/sci/A09122