starfish

Description: The density of water also causes problems that increase dramatically with depth. The atmospheric pressure at the surface is 14.7 PSI or around 100 kPa. A comparable water pressure occurs at a depth of only 10 m (34 ft.) (9.8 m (33 ft) for sea water.) Thus, at about 10 m below the surface the water exerts twice the pressure (2 atmospheres or 200... ( +expand to view full text )

Description: The density of water also causes problems that increase dramatically with depth. The atmospheric pressure at the surface is 14.7 PSI or around 100 kPa. A comparable water pressure occurs at a depth of only 10 m (34 ft.) (9.8 m (33 ft) for sea water.) Thus, at about 10 m below the surface the water exerts twice the pressure (2 atmospheres or 200 kPa) on the body as air at surface level.