The same reason every other gas in a Scuba cylinder is compressed. If a cylinder is pressurized, then the gas in it is compressed by definition. If it is not pressurized, then there is obviously no gas in the cylinder to breath.
The same reason every other gas in a scuba cylinder is compressed. If a cylinder is pressurized, then the gas in it is compressed by definition. If it is not pressurized, then there is obviously no gas in the cylinder to breath.
It's compressed so they can fit fit more oxygen in it. In face it's compressed so much that it actually turns into a liquid.
Oxygen can be compressed and using a diving situation either in a mix with other gases such as in normal air or special mixes i.e. Trimix, Nitrox etc. Or it could be compressed and used on its own. Compressed oxygen on its own is usually only used in rebreathers where the exhaled gas is reoxygenated. In short, oxygen can be compressed on its own or with other gases for use in SCUBA diving
Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.
The air inside SCUBA tanks is, usually, just regular air that has been compressed and "jammed" into a tank. Some diving applications utilize gas mixtures of oxygen, nitrogen (and sometimes hydrogen).
The simple answer is ... you don't. A majority of scuba dives use compressed air in the cylinders. Therefore you don't need "oxygen" cylinders. HOWEVER, if you are a diver that is diving on Nitrox, in which divers change the amount of oxygen vs nitrogen in their air, then your tank needs to be "oxygen clean" because you are putting oxygen in first, then nitrogen.
Generally compressed air (oxygen 20 % and nitrogen 80 %; for other mixtures see the link bellow.
Compressed oxygen--oxygen that is stored as a gas in a tank.
actually compressed oxygen does actually have weight.
Scuba divers also wear lead weights on a belt
The compressed air pushing against the inside of the scuba tank causes pressure inside it.
Unless you've been specially trained to use any other form of air, it's the same as normal air, just compressed with impurities removed.
There are 2 answers to this... air or sometimes nitrox is compressed into scuba tanks using multi stage compressors. These use pistons to increase pressure incrementally and then remove the water and filter it in a 'filter stack'. Oxygen is much more difficult to put into cylinders because it is highly reactive at high pressures. It is either decanted from high pressure oxygen cylinders or pumped from an oxygen cylinder to a higher pressure using a booster pump. You need to ensure that there are no fuels in cylinders like oil from previously being filled with air from a conventional compressor as this can cause a dangerous reaction when the oxygen is added.
Because that is what air is made of and scuba divers need to breath air. It is however possible to increase the amount of O2 in the gas mixture if you are trained to breath Nitrox as a scuba diver and if you are a technical diver to add other gases such as helium to the mix. Recreational diver however normally breath simply compressed air.
they have weight belts
SCUBA tanks are metal (usually steel or aluminum) that are filled with compressed air. This is loosely related to a pneumatic system.
Depends on what the gas is. Compressed air is used by scuba divers to breathe, auto mechanics to drive lots of theirtools, carpenters for air powered nailers. Compressed oxygen is usedto help people with breathing problems in or out of the hospital,withacetylene in oxy-acetylene torches to cut thru metals. Maybe you mean CNG, compressed natural gas, which is mostly methane, and is used as a fuel.
Technical scuba divers do, but recreational divers do not.
Refrigerators, combustion engines, air cannons, SCUBA and submarines.
You can use a scuba tank, but that is it.
Naturally the air we breath has 70% of nitrogen and only 21% of oxygen, this is done is scuba diving as well. Just oxygen is not enough for living, while oxygen is essential one.
To fit more in. If it was at 1 atmosphere of pressure it would be like breathing out of a bag. (You would run out of air in about 5 or 6 breaths) Addendum: I should add that it's not oxygen in SCUBA tanks; it's air. Oxygen when delivered under pressure, can cause convulsions. You'll never see a diver with oxygen in her tanks.The above is correct, however oxygen is used by technical divers during decompression at very shallow depths. But this is not what is in the divers main gas or bottom gas.
No it is not by any means. it is atmospheric air compressed with the high amounts of carbons and other gases lowered or removed.
Different scuba gear types weigh different amounts. The oxygen tank is the heavy part of the scuba diving gear.