Understanding Pressure in Outer Space: Equilibrium and Volume Variations

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Discussion Overview

The discussion revolves around the concept of pressure in outer space, particularly focusing on the equilibrium of small volume elements within hypothetical cubes placed in space. Participants explore how pressure may vary with volume and the implications of equilibrium in such scenarios.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant proposes a scenario involving a cube in outer space and suggests that pressure acting on a small volume element within the cube is equal from both sides, indicating equilibrium.
  • Another participant questions the clarity of the initial post, suggesting that the information presented is fragmented and lacks coherence.
  • A different participant reiterates the initial scenario, emphasizing that for any volume element, the pressure on opposing sides is equal in a state of equilibrium, while also considering the possibility of pressure gradients in the presence of external forces.
  • There is a suggestion that pressure may vary with volume, though the specifics of this relationship are not fully articulated or agreed upon.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the clarity of the initial post or the specifics of the pressure-volume relationship. Multiple perspectives on the scenario and its implications remain present, indicating ongoing debate and uncertainty.

Contextual Notes

There are limitations in the clarity of the initial descriptions, and assumptions regarding the nature of the cubes and the source of pressure are not fully defined. The discussion also touches on the effects of external forces, such as gravity, without resolving how these factors influence the equilibrium state.

nomorevishnu
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Pressure in outer space!

lets imagine a cube kept in the outer space...and let's take a small element inside the cube...with thickness dy and width dx...or the smalles volume elemnt inside the cube would be another cube right...and...it would be in equilibrium...so the pressure actin on that element from the top and the bottom are going to be the same ...

think abt two cubes ...two different volumes...kept somewhere in the outerspace...take two elements in each of the cubes...the elements r still going to be in equlibrium...but the magnitudes of the pressure actin on both the elemnts r going to different right?...as pressure varies with volume...??
 
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Try to write your post in english.
 
wht do u mean?...r u talkin abt the typos?...guys, is the post not in english?...help with an answer someone please...
 
Those are English words, sure 'nough, but the way that they're put together doesn't make a lot of sense. You've got a lot of partial information and partial questions, none of which add up to a coherent post. Try to rephrase it with all relevant parts included.
 
For starters, cubes of what and where is this pressure coming from?
 
nomorevishnu said:
lets imagine a cube kept in the outer space...and let's take a small element inside the cube...with thickness dy and width dx...or the smalles volume elemnt inside the cube would be another cube right...and...it would be in equilibrium...so the pressure actin on that element from the top and the bottom are going to be the same ...

think abt two cubes ...two different volumes...kept somewhere in the outerspace...take two elements in each of the cubes...the elements r still going to be in equlibrium...but the magnitudes of the pressure actin on both the elemnts r going to different right?...as pressure varies with volume...??
Let me know if I got this right. There's this cube somewhere. Inside the cube, for any volume element dV = dxdydz, the pressure on one side of the element is equal to the pressure on the other side, for all three dimensions. This cube happens to be in equilibrium.

(I imagine it is possible to have a volume with a pressure gradient to be in equilibrium if there's an external force being applied that depends on position. For example, if we ignore the Earth's rotation and the heating of the sun, then the Earth's atmosphere would be in equilibrium, even though it would thin out as the distance R from the Earth's center increases. This is possible because of the Earth's gravity. I imagine the converse would be true too.)

I'm not quite sure what you were asking, but hopefully this helps.
 

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