Concept explainers
The absolute pressure in water at a depth of 9 m is read to be 185 kPa. Determine (a) the local atmospheric pressure and (b) the absolute pressure at a depth of 5 m in a liquid whose specific gravity is 0 85 at the same location.
(a)
The local atmospheric pressure in a liquid.
Answer to Problem 53P
The local atmospheric pressure in a liquid is
Explanation of Solution
Show the free body diagram of the absolute pressure in water.
Determine the density of the liquid.
Here, the specific gravity is
Write the expression of atmospheric pressure.
Here, the absolute pressure is
Conclusion:
Substitute
Substitute
Thus, local atmospheric pressure in a liquid is
(b)
The absolute pressure in a liquid.
Answer to Problem 53P
The absolute pressure in a liquid is
Explanation of Solution
Write the expression of absolute pressure.
Here, the absolute pressure is
Conclusion:
Substitute
Thus, the absolute pressure in a liquid is
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