The amount of a fissile substance that will allow a self-sustaining chain reaction. The amount depends both on the properties of the fissile element and on the shape of the mass.
The amount of uranium needed to cause a self-sustaining chain reaction.
The mass of an isotope above which a self-sustaining chain reaction can occur.
the minimum amount of a fissionable material needed to sustain a nuclear chain reaction for a given set of circumstances
Dr. Deming uses this term to refer to that stage when an organization has "recruited" enough of its personnel to a new idea or philosophy that the transformation or change process will now be self-sustaining. Enough people will be behind the idea and will help convert others that the new idea will "take hold".
Spontaneous fission in uranium produces neutrons that induce fission of 235U, which releases neutrons that can produce a chain reaction. The critical mass is the amount of fissable material necessary for this chain reaction to sustain itself.
mass of fissionable material needed to sustain a nuclear chain reaction. (see nuclear fission)
The necessary or sufficient number of islets required to reverse diabetes. In the Edmonton Procedure this mass was 9,000 IEq/kg of recipient body weight.
The amount of fissionable material (uranium 235 or plutonium 239) sufficient to sustain a nuclear chain reaction.
The amount of a particular fissionable material required to make a fission reaction self-sustaining.
the minimum amount (of something) required to start or maintain a venture; "the battle for the computer market has now reached critical mass"; "there is now a critical mass of successful women to take the lead"; "they sold the business because it lacked critical mass"
the minimum mass of fissionable material that can sustain a chain reaction
a big enough subset of science to imply what to expect from some observation or experiment
a self organized, independent meeting of bikers, rollerbladers, skateboarders, etc
Technology derives its value from the extent to which its use is universal among potential users. Critical mass is the point when the number of users of the technology is such that its use is considered to be ‘universal'.
A critical mass is the quantity of fissionable material just large enough and of the right shape to produce a sufficient number of neutrons to cause a self sustaining chain reaction of fissions within it. The point at which this is reached is termed 'criticality.'
the minimum amount of fissile material that can achieve a self-sustaining nuclear chain reaction.
the mass of fissionable material required to produce a self-sustaining chain reaction.
the minimum complement of scientists needed to provide leadership and generate impact in a scientific field of endeavour
The critical mass is the minimum amount of a radioactive substance required before a chain reaction will start. Nuclear Power
A state of freedom from worry and anxiety about money due to the accumulation of assets which make it possible to live your life as you choose without working if you prefer not to work or just working because you enjoy your work but don't need the income. Plainly stated, the Land of Critical Mass is a place in which individuals enjoy their own personal financial nirvana. Differentiation between earned income and assets is a fundamental lesson to learn when thinking in terms of critical mass. Earned income does not produce critical mass......critical mass is strictly a function of assets.
When enough buyers and sellers participate in a Net market so goods or services change hands efficiently. Also, the time when a market gains momentum, achieves liquidity, and becomes a more efficient way to buy or sell than the traditional physical market or channel. (See network effect, liquidity.)
Amount of fissionable nuclei needed to sustain a nuclear fission chain reaction.
The minimum mass required to sustain a chain reaction. The exact mass varies with many factors such as the particular isotope present, its concentration and chemical form, the geometric arrangement of the material, and its density.
The minimum mass of a fissionable material that will just maintain a fission chain reaction under precisely specified conditions, such as the nature of the material and its purity, the nature and thickness of the tamper (or neutron reflector), the density, and the physical shape. For an explosion to occur, the system must be supercritical (i.e., the mass of the material must exceed the critical mass under the existing conditions). See; Fission, Supercritical.
The smallest mass of a fissionable material (uranium, plutonium) that will sustain a nuclear chain reaction.
The smallest mass of fissile material that will support a self-sustaining chain reaction under specified conditions.
the minimum mass of fissionable material that will support a sustaining chain reaction.
the total mass ("weight") of material needed to detonate a nuclear device. As the density of the material is increased, the needed critical mass decreases.
A fund's critical mass is the minimum size needed to accomplish its trading objectives and operate efficiently enough to satisfy the profit needs of the fund company.
Critical Mass is a bike ride typically held on the last Friday of every month in cities around the world where bicyclists and, less frequently, skateboarders, roller bladers, roller skaters and other self-propelled commuters take to the streets en masse. Critical Mass is not led, and has no officially-stated message, though it is largely understood to be an effort to promote alternative (non-motorized) modes of transportation and to raise awareness about the safety issues that face commuters using non-motorized forms of transportation when sharing the streets with motor vehicles. Participants meet at a set location and time and enjoy the security and companionship of traveling as a group through city streets.
Critical mass in software engineering is a term used to describe a stage in software life cycle: when the source code grows too large to effectively manage without a complete rewrite. At the Critical Mass stage, fixing one bug can easily introduce several more bugs.
Critical Mass is the fifth album by British progressive metal band Threshold. It was recorded in early 2002 and released in September. It is also the last album to feature original bassist Jon Jeary, who left immediately after the release.
Critical Mass is the fourth Marvel Heroclix set produced by Wizkids released Dec 2003 and retired Sept 2005.
Critical Mass is a low budget action film released straight-to-video in 2000 starring Treat Williams, Lori Loughlin and Udo Kier. The film features scenes taken straight from other films such as Terminator 2: Judgment Day and Universal Soldier spliced into newly filmed scenes to make up its action sequences.
Critical Mass is a ska band, formed in 1992 from the San Francisco Bay area. The members had played in various bands over the prior decade, including The Noise, Basic radio, JFK, Missing Link, Chill Factor and Elephant Men.
Critical Mass is a turn-based strategy game in which the player leads a squadron of spaceships on various missions. The game is a simple, stylized space battle between two opposing forces. Game elements include large asteroid fields, planets, and various offensive and defensive ships.
Critical mass is a sociodynamic term to describe the existence of sufficient momentum in a social system such that the momentum becomes self-sustaining and fuels further growth.
Critical Mass is a Christian rock band from Ontario, Canada. The band is heavily influenced by its Catholic roots. They have produced and released five albums over their decade long existence.
Critical Mass is a pressure group which began its days in opposition to the government of Margaret Thatcher. It supported the National Union of Mineworkers (NUM). Critical Mass was founded in 1984 in Ramsgate as a result of regulations that prevented local inhabitants out of work from living in the then-numerous empty hotels desperate for trade.