All Questions
Tagged with dark-energy pressure
10
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What is the pressure that dark energy exerts on stars and planets while increasing the distance between them?
What is the pressure that dark energy exerts on stars and planets while increasing the distance between them? I can understand that the pressure should be at a volume scales lower than molecules ...
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Is the present (total) pressure in the universe negative?
I read from cosmological books that the pressure associated with the dark energy component, which is responsible for the accelerating expansion of the universe, is negative. Is the total pressure of ...
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How can the interior pressure of compact objects affect cosmology?
This paper suggests that dark energy concentrated in black hole interiors (they use an unconventional BH model) could act like a cosmological constant. Their claim is that to calculate the equation of ...
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Negative pressure in general relativity
Is there an intuitive way to understand what negative pressure means in general relativity in the same way as positive pressure can be thought to be kinetic energy of gas particles? Dark energy has ...
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Where does negative pressure in dark energy arise?
In the 2nd friedmann equation, the pressure term of dark energy is what counteracts the energy density and cause acceleration of the expansion of universe. But normal pressure gradient arises from the ...
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Can the fact that dark energy increases with volume be explained by classical thermodynamics?
Considering adiabatic process in classical thermodynamics, a normal substance with (positive) pressure must do work on its environment in order for the volume to increase by $ dV $(like pushing the ...
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Is it certain that accelerated space expansion is caused by negative pressure?
Pressure cause attractive gravity so we think that negative pressure should be repulsive.
And I've read that negative pressure means constant energy density in an expanding universe which mean energy ...
- 855
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Gravitational waves and negative pressure
I was recently reviewing an article published by Dr. Harold White and Dr. Eric Davis (as seen here) which summarized the creation and activity of negative pressure for a supposed place-filler for the ...
user138731
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Negative pressure, tension, and energy conditions
We have lots of common everyday experience with positive pressure, the canonical example is a gas.
But other examples of positive pressure are easy to imagine: for instance, a solid that gets ...
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'Negative pressure' counteracting gravity?
Dark energy may be described as a fluid with negative pressure.
We say that this negative pressure counteracts gravity and accelerates the expansion of the Universe.
Now consider, for example, a ...
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