Problem In a condenser containing air and water, the air pressure is 22.1 kPa absolute. What is the gage pressure in kiloNewton per square meter at a point 1.37 m below the water surface.
Solution
$p_A = -79.225 \, \text{kPa}$
Pressure at 1.37 m below the water surface $p = p_A + \gamma h$
$p = -79.225 + 9.81(1.37)$
$p = -65.7853 \, \text{kPa}$ answers
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