Topic: Critical Density
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What is critical density?
( ′krid·ə·kəl ′den·səd·ē ) (astronomy) The mass density above which, it is believed, the expansion of the universe will slow down and reverse. (chemistry) The density of a substance exhibited at its critical temperature and critical pressur... Read More »
Source: http://www.answers.com/topic/critical-density
What is critical current density?
( ′krid·ə·kəl ′kər·ənt ′den·səd·ē ) (physical chemistry) The amount of current per unit area of electrode at which an abrupt change occurs in a variable of an electrolytic process. Read More »
Source: http://www.answers.com/topic/critical-current-density
What does it mean when you say that the universe is below the cri...
If the universe is ever to stop expanding and start contracting there has to be a certain amount of material (mass). This amount is called the 'critical density'. So far as is known to date the universe does not have sufficient mass to stop... Read More »
Source: http://wiki.answers.com/Q/What_does_it_mean_when_you_say_that_the...
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Critical Density
(n.) The density of a pure element or compound at a critical point
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More Common Questions
Answers to Other Common Questions
For a pure component the density difference between a liquid and gas approaches zero as the critical point is approached. By definition liquid and gaseous phases are indistinguishable (meaning no difference) at the critical point. Wikipedia...
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Source: http://wiki.answers.com/Q/How_does_density_vary_for_a_component_a...
Numerically the critical density is 3Ho2/[8*pi*G] or 19*[Ho/100]2*10-30 gm/cc.
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Source: http://www.chacha.com/question/what-is-the-equation-for-the-criti...
I don't think it is http://www.cs.umass.edu/~immerman/stanfo… The problem is that the formula is incorrect... it should be... 3c²H_0²/8πG H_0 is read "H base 0." Bases in mathematics usually denote a certain quantity of that variable.
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Source: http://answers.yahoo.com/question/index?qid=20111120134208AA8t1PY
This is refering to the "big crunch" i think. Basically, if the universe has enough density then it will eventually stop expanding and contract. Due to the gravitational attraction of all the mass. If it is less dense then the gravitational...
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Source: http://answers.yahoo.com/question/index?qid=20080804051558AAB0RAH
I believe it's B. critical density: the density of the Universe necessary so the expansion rate of the Universe is just barely sufficient to prevent a recollapse. Numerically the critical density is 3Ho2/[8*pi*G] or 19*[Ho/100]2*10-30 gm/cc...
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Source: http://answers.yahoo.com/question/index?qid=20070417131903AAZpgdS
Well, the critical density is the critical density. It's whether the *actual* density is above or below rho-critical that's the issue. At the moment, as far as we can tell, the value of omega (density divided by critical density) is really ...
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Source: http://answers.yahoo.com/question/index?qid=20071001221052AABefBI
