Diving physics
474931
224410631
2008-07-08T18:56:42Z
RexxS
6112901
Added pressure-temperature law - see Talk page + changed unreferenced to refimprove
{{refimprove|date=July 2008}}
These are the laws of physics that govern the physics of the [[Scuba diving|SCUBA diver]] and of diving equipment:
* [[Buoyancy]] - when in water, the [[density]] of the materials in the diver's [[human body|body]] and in the diver's [[SCUBA Equipment|equipment]] determine whether the diver floats or sinks
* [[Boyle's law]] - as pressure increases the volume of gases in the diver's body and equipment decreases<ref name=acott>{{cite journal |author=Acott, C |title=The diving "Law-ers": A brief resume of their lives. |journal=South Pacific Underwater Medicine Society journal |volume=29 |issue= |date=1999 |issn=0813-1988 |oclc=16986801 |url=http://archive.rubicon-foundation.org/5990 |accessdate=2008-07-07 }}</ref>
* [[Amontons' Law]] - as temperature increases the pressure in a [[diving cylinder]] increases (also known as [[Gay-Lussac's_Law#Pressure-temperature_law|Gay-Lussac's law]])<ref>{{cite web |url=http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch4/gaslaws3.html#amonton |title=Amonton's Law |publisher=Purdue University |accessdate=2008-07-08}}</ref>
* [[Dalton's law]] - in mixtures of [[breathing gas]]es the concentration of the individual components of the gas mix is measured by [[partial pressure]]<ref name=acott/>
* [[Henry's law]] - as pressure increases the quantity of gas adsorbed by the [[biological tissue|tissues]] of the [[human body]] increases, increasing the risk of [[decompression sickness]]
* [[Snell's law]] - the index of [[refraction]] of water is similar to that of the [[cornea]] of the [[eye]]—30% greater than air—hence a diver cannot see clearly underwater without a [[diving mask]] with an internal airspace
Physical effects of [[water]] or the [[underwater]] environment:
* [[Pressure]] - the overall pressure on a diver is the sum of the [[atmospheric pressure]] and the water pressure
* [[Density]] - common materials found in [[human body|body]] and in the diver's [[SCUBA Equipment|equipment]] such as [[air]], [[water]], [[steel]] and [[lead]] have widely differing densities.
* [[Thermal conductivity]] of water is higher than air
* Absorption of [[light]] and loss of [[colour]] underwater
* Under pressure, [[gas]]es compress but [[liquids]] do not
* [[Gravity|Gravitational]] [[force]]s and the rotation of the [[earth]] cause [[tides|tidal]] currents
* Effects of [[weather]] such as [[wind]], which causes [[waves]], and [[temperature]].
== References ==
{{Reflist}}
[[Category:Underwater diving]]
[[Category:Physics]]
[[Category:Sports science]]
[[de:Tauchphysik]]
[[no:Dykkefysikk]]