Sentences with phrase «hydrostatic equilibrium»
Hydrostatic equilibrium means that there is a balance between the upward pressure from a fluid, like water or air, and the downward force of gravity. It occurs when the pressure in the fluid increases with depth, causing the fluid to distribute its weight evenly and maintain a stable shape. Full definition
However the temperature gradient in the lower stratosphere is of opposite sign and so the stratosphere can not be in a state of thermodynamic equilibrium — it can only be in hydrostatic equilibrium with a continual convective heat transfer from the lower stratosphere towards the tropopause and upper troposphere.
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When the two forces are equal, this balance is called hydrostatic equilibrium.
The equation for condensation rate (34) is not physically independent of the Euler (N - S) equations because it assumes hydrostatic equilibrium.
Recalling that in hydrostatic equilibrium q = — u ∇ p = RT (u ∇ N)(4) and using (3) we obtain from (6)
The International Astronomical Union (IAU) said that the definition for a planet is now officially known as «a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self - gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape and (c) has cleared the neighborhood around its orbit.»
Thus the star forms a self - regulating system in hydrostatic equilibrium that is stable over the course of its main sequence lifetime.
A higher opacity has an insulating effect that retains more energy at the core, so the star does not need to produce as much energy to remain in hydrostatic equilibrium.
Haumea is unique because of its ellipsoid shape, only just meeting the hydrostatic equilibrium criteria for dwarf planet status.
Lighter, warmer air will always rise above heavier, colder air within an atmosphere suspended off a surface against gravity in hydrostatic equilibrium.
Remember, it is always in hydrostatic equilibrium.»