Pressure of Inert Gas in kN/m^2: 167.82 | Well-Type Manometer

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Discussion Overview

The discussion revolves around calculating the pressure of an inert gas using a well-type manometer, specifically focusing on the application of fluid dynamics principles. Participants explore the problem presented, share their understanding of the relevant concepts, and seek assistance in solving the equation.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant presents a problem involving a well-type mercury manometer and requests to calculate the pressure of an inert gas based on given parameters.
  • Another participant expresses difficulty in understanding the question and seeks guidance on how to approach the problem.
  • Multiple participants emphasize the need for the original poster to show their work and detail what they have attempted so far.
  • A participant mentions their background in marine engineering and notes that they have only studied differential pressure, indicating a gap in knowledge regarding the specific chapter on pressure measurement.
  • References to external resources are made, suggesting that the original poster consider different cases of U-tube manometers to find the most applicable one for their problem.
  • One participant shares their solution process, detailing the formula used and the assumptions made, including the atmospheric pressure as a reference point.

Areas of Agreement / Disagreement

There is no consensus on the solution process at the start, as participants express varying levels of understanding and seek clarification. However, a later reply indicates that one participant has managed to solve the problem, suggesting a resolution for that individual but not for the group as a whole.

Contextual Notes

Participants note the importance of understanding fluid dynamics and the specific equations relevant to pressure measurement, highlighting that some may not have covered this material in their coursework yet.

Who May Find This Useful

Students studying fluid dynamics, particularly those in engineering courses, may find this discussion relevant as it addresses practical applications of manometer principles and problem-solving strategies in homework contexts.

Irene Jin
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Homework: Misplaced Thread
A well-type mercury manometer has a well of 0.02m^2 area and a tube of 40mm^2 area. The liquid has a density of 13,534 kg/m^3.Given that the tube is open to the atmosphere and the well is connected to the inert gas manometer was to measure:
Calculate the pressure of the inert gas in kN/m^2 if the height of the measuring column is 500 mm.

The answer given is 167.82kN/m^2.
 
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I can't get the ans, need help with this question
 
You must show us your work. What have you tried so far?
 
anorlunda said:
You must show us your work. What have you tried so far?
So sorry is my first time asking a question here. The main problem here is, I don't really know how to start, totally don't understand the question. Need some guides
 
Well, what have you studied? Do you know the math of fluid dynamics? What course does this homework come from?
 
anorlunda said:
Well, what have you studied? Do you know the math of fluid dynamics? What course does this homework come from?
Currently I am in the marine engineering course. And we are not studying the chapter "measurement of process pressure" we just learned how to find the differential pressure, so there are a few equation u can use to find it.
 
Manage to solve it. So basically I use the formula p2-p1=density*g*h(a/A+1)
So for this question since it stated that its open to the atmosphere thus p1 will equal to the standard atmospheric pressure which is 1.013*10^5 N/M^2, which I didn't know it at first.
So this is how I did it :
P2- (1.013*10^5) =13534*9.81*0.5(40*10^6/0.02 +1)
P2=167817 (N/m^2) / 167.82 (kN/m^2)
 
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