Concept explainers
The pressure in a natural gas pipeline is measured by the manometer shown in Fig. P1–67E with one of the arms open to the atmosphere where the local atmospheric pressure is 14.2 psia. Determine the absolute pressure in the pipeline.
The absolute pressure in the pipeline.
Answer to Problem 67P
The absolute pressure in the pipeline is
Explanation of Solution
Determine the density of mercury.
Here, the specific gravity of the mercury is
Write the expression of pressure in a double U-tube manometer with one arms open to the atmosphere.
Here, the absolute pressure in the pipeline is
Conclusion:
From the Table A-3E (a) “Properties of common liquids, solids, and foods” to obtain the value for density of water as
Substitute
Substitute
Thus, the absolute pressure in the pipeline is
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