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The term critical density refers to the value in which the Universe is at balance. This also refers to the stopping of expansion.

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What is the critical density of argon?

The critical density of argon is approximately 7.18 grams per cubic centimeter. This is the density at the critical point where the liquid and gas phases become indistinguishable.


Compare and contrast average density and critical density?

the average density is the total amount of matter in the universe, whereas the critical density is about 10 to the -26th power kg/m cubed (to the third power), the dividing point between a closed or open universe.... :)


The density of a gas is maximum at?

It's Critical Point?


What does it mean when you say that the universe is below the critical density?

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 expanding, hence it is below the critical density.


Why critical angle for water is greater than the critical angle of glass?

Because of the difference in the density of the materials.


How does density vary for a component at its critical point?

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.


What model asserts the universe will stop expanding A High Density Universe B Low Density Universe C Critical Density Universe D both A and C or E none of the above?

C. Critical Density Universe. This model suggests that the expansion of the universe will eventually slow down and stop, leading to a stable universe.


What is the density of insulin?

Insulin is a type of hormone which is created by beta cells in the pancreas. Insulin is critical in the process of metabolism. The density of insulin is not listed.


What is the formula of critical velocity?

Vc = (Reyonlds Number * viscosity)/diameter of tube*density


What is the rackett equation?

The Rackett equation is used to predict the density of a pure liquid vs temperature based on its critical properties. One density value is required to calculate the Rackett constant in the equation, then the critical properties Tc, Vc, and Pc are used to estimate new density values as the temperature changes.


What is a substance's critical point?

A substance's critical point is the temperature and pressure at which the gas and liquid phases of the substance become indistinguishable, forming a supercritical fluid. At the critical point, the substance exhibits unique properties, such as density and viscosity, that differ from those of its gas or liquid phases.


How dense is dark matter?

This can be answered in two steps: 1) What is the average density of all gravitational matter in the Universe? It has surprised astrophysicists that this density is extremely close to the "critical" density; above which our Universe eventually collapses in itself, and below which our Universe expands forever. This critical density is about 5 x 10^-30 grams per cubic centimeter. 2) How much of the mass of the Universe is NOT dark matter? What shocked astrophysicists even more was determining that the average density of all luminous matter was only about 20% of the critical density. Thus, about 80% of the measured density of our Universe can be accounted for via stuff that gives off light. The ratio of hydrogen to helium to deuterium in our Universe puts an upper limit on the density of baryonic matter in our Universe. This calculation also shows that the density of baryonic matter can not be more than about 20% of the critical density. These two, completely independent calculations of the amount of luminous and of baryonic matter -- the stuff we understand -- in our Universe have left scientists with little choice but to conclude that 80% of the gravitational mass in our Universe is composed of something we don't understand. And that's why we call it "dark" matter. Since the Universe has a density of 5 x 10^-30 grams per cc, and only 80% of that is dark matter, then the latter's average density is about 4 x 10^-30 grams per cc.