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When the pressure surrounding an object increases, its volume decreases and its density increases. The pressure exerted by a static fluid is determined by three factors: the depth of the fluid, the density of the fluid, and the acceleration of gravity. Importantly, the fluid pressure at a given depth is independent of the total mass or total volume of the fluid. Instead, pressure only varies according to how deep the object is submerged. As a rule of thumb, pressure increases by 1 bar for every 10 meters of depth.