Why is P/A equal to 83kPA at an eccentricity ratio of 1?

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Discussion Overview

The discussion centers on understanding why the pressure-to-area ratio (P/A) is equal to 83 kPa at an eccentricity ratio of 1 in a specific engineering context. Participants are examining the graphical representation and the significance of a vertical line drawn at a certain point on a diagram.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant expresses confusion about the reasoning behind the P/A value at an eccentricity ratio of 1 and questions the placement of a vertical line on the diagram.
  • Another participant asserts that the vertical line corresponds to a specific kl/r value of 104, although the basis for this assertion is not fully explained.
  • A third participant suggests that the original poster is attempting to learn a large amount of material in a short time frame, implying a need to focus on foundational concepts.
  • A follow-up question is raised regarding how the kl/r value of 104 is determined, indicating a lack of clarity on this point.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the reasoning behind the P/A value or the significance of the kl/r value. Multiple viewpoints and questions remain unresolved.

Contextual Notes

The discussion highlights potential gaps in understanding the graphical representation and the underlying principles related to the eccentricity ratio and pressure calculations. Specific assumptions or definitions related to kl/r are not clarified.

chetzread
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Homework Statement


in this question , ( in second photo) i don't understand that why at eccentricity ratio = 1 , P/ A is 83kPA , why the vertical line is drawn at a point between 100 and 150 KL/r to find P/A ?

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The Attempt at a Solution


Is it wrong ? Or I left out something? [/B]
 

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The vertical line is drawn at the given kl/r of 104.
You are trying to cram 4 years of engineering into 4 weeks. It won't work. Focus on the basics please.
 
H
PhanthomJay said:
The vertical line is drawn at the given kl/r of 104.
You are trying to cram 4 years of engineering into 4 weeks. It won't work. Focus on the basics please.
How do we know that kl /r =104??
 
Given in first image
 
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