If the atmospheric pressure is 101 kN/m^2 , what is the absolute pressure of water at depth of 12 m below the surface?
1 Answer
May 6, 2018
Gauge Pressure
#"GP"=rhogh#
where#rho# is density of fluid,#g=9.81\ ms^-2# , acceleration due to gravity and#h# height of liquid column.
Inserting various values we get
#"GP"= 10^(3)xx9.81xx12=117.72\ kN.m^(-2)#
Now
#"Absolute pressure" ="GP"+"atmospheric pressure"#
#=>"Absolute pressure" =117.72+101#
#=>"Absolute pressure" =219\ kN.m^(-2)# , three significant figures.