Diving Bell

A diving bell is a chamber suspended by a cable that allows divers to stay underwater for long periods of time, thus avoiding the need to return to the surface repeatedly and risking decompression sickness. With increasing depth , the height of the level of water in the tank increases, compressing the air inside the chamber. Such a device was described by Aristotle.


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The relation between the depth and the height is given by
where is the pressure, is the density of water, and is the acceleration due to gravity.
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