上游充通大学 Shanghai Jiao Tong University 4.5 Hydrostatic Pressure Difference Between Two Points For a fluid with constant density, Pbelow=Pabove+Pg△z As a diver goes down,the pressure on his ears increases.So,the pressure "below"is greater than the pressure "above."Shanghai Jiao Tong University 4.5 Hydrostatic Pressure Difference Between Two Points As a diver goes down, the pressure on his ears increases. So, the pressure "below" is greater than the pressure "above." For a fluid with constant density, below above p p gz = + Δ ρ