Problem 09 - Variation of Pressure

Note: Absolute pressures are sometimes measured in atmospheres. Example: 1 atmosphere = 101.325 kPa absolute and 3.2 atmosphere = 324.24 kPa absolute.
 

$p = 2.75(101.325) = 278.644 \, \text{ kPa absolute}$

$p = 278.644 - 101.325$

$p = 177.319 \, \text{ kPa gage}$           answer
 

$h = \dfrac{p}{\gamma_w} = \dfrac{177.319}{9.81}$

$h = 18.08 \, \text{ m of water}$           answer
 

Fact:
For convenience, engineers usually round off the atmospheric pressure to 100 kPa. It is the value of the pressure unit called bar (1 bar = 100 kPa).