Are you in ms.wood's chemistry class!
who are you? =D
There are various scientific elements of diving. For example, the physics around the law of gases and how gases behave when compressed. There is a lot on human physiology and how the body changes underwater.
There are polutants or pollution
Many gases, such as helium.
Besides solids, there are liquids and gases.
Air conditioning, Shocks/Struts, Bulbs,
There are a number of different gases for diving. Most commonly, air is used for recreational diving. Sometimes, nitrox is used which is a higher proportion of oxygen. This is usually 30-35% oxygen instead of the ~20% in air. This has the benefit of less nitrogen so less "on-gassing". This increases the bottom time and reduces the decompression stops. For commercial diving, there are a number of other gases used such as Trimix which I believe has Helium in it.
explain the technoligies involved inpressure cooker, bicycle, pump, scuba diving, artificial longs?
Yes, it does.
there are many other gases like nitrogen, helium and water vapour in the air
No and no, the law of expanding gases may cause death or damage to your lungs. If you take a breath from a spare air tank at depth and you ascend the compressed air will expand and may kill you. If diving with ANY breathing apparatus you must get certified in scuba...learn basic laws of diving, live longer
- Helium is less dense than air. - For diving, as diluents for oxygen nitrogen and helium are used.
N2, nitrogen is about 78% in air but does not take part in several reactions as oxygen does so we can say that after noble gases Nitrogen is the least reactive gas or element.