What is the absolute pressure 2.5 m below sea surface?
To determine the absolute pressure 2.5 meters below the sea surface, you can use the equation for pressure in a fluid:
P = P₀ + ρgh
Where:
P is the absolute pressure at a certain depth,
P₀ is the atmospheric pressure at the surface (approximately 101,325 Pa),
ρ is the density of the fluid (sea water in this case),
g is the acceleration due to gravity (approximately 9.8 m/s²), and
h is the depth below the surface.
First, let's calculate the density of seawater. The average density of seawater is around 1,025 kg/m³.
Next, substitute the values into the equation:
P = 101,325 Pa + (1,025 kg/m³)(9.8 m/s²)(2.5 m)
P = 101,325 Pa + 25,122.5 Pa
P ≈ 126,447.5 Pa
Therefore, the absolute pressure 2.5 meters below the sea surface would be approximately 126,447.5 Pascal (Pa).