The equation for the pressure P of an incompressible, static fluid on the Earth as a function of depth y below the surface is also called the equation for hydrostatic equilibrium. P=pgy+Po Suppose salt water has flooded the interior of a large oil tank to a depth of h = 6.00 m. On top of the water is a layer of oil h, -9.00 m deep, as seen in the figure below. Air Pa Oil P Water Phot @ The oil has a density of 700 kg/m, and the saltwater has a density of 1,025 kg/m. The air above the oil is at standard atmospheric pressure, or 1.01 x 105 Pa. What is the pressure at the bottom of the oil layer? Pa Now, knowing the pressure at the top of the water layer, calculate the pressure at the bottom of the tank. Pa