It passes thru the regulator where the surrounding pressure of the water regulates the pressure of the air in the line so that it is equal. This prevents any pressure differential that would make it hard to breathe.
As for the air in the Scuba cylinder, nothing happens to it as you go down. The pressure stays the same, etc. As to how breathing from a SCUBA cylinder works, there is an excellent answer under the question "How do you breathe underwater when you go scuba diving?"
The deeper the diver goes, the greater the pressure exerted on the diver's body. This results in a number of things:
Each 10 meters deep the air volume in the tank compressed to the half
0m = 100%
10m= 50%
20m= 33%
30m= 25%
Addition
Actually nothing happens to the gas inside a scuba cylinder during a descent (or an ascent). The cylinder is not a flexible container so the pressure, volume, etc. remains constant. However, once the gas is released from the cylinder (i.e. when a diver breathes from from the cylinder, then the gas would be compressed as compared to the surface. The description above shows the amount of compression that would occur in that instance.
Not really. However, over time, if the air remains unchanged it has a "taste" that is not pleasurable, and potentially could include something harmful. In addition, SCUBA tanks should get a visual inspection once a year and be tested every five years.
A cardinal rule for scuba diving tanks is to never completely empty your scuba diving tank. When planning your scuba dives, it is important that you consider to complete your dive with enough air left within your scuba diving tank.
Due to the mass of the water above you, as you descend in to the water, the pressure increases at about 1 bar for every 10m. This is why if you have been in a deep swimming pool you can sometimes feel pressure on your ears if you swim to the bottom of the pool. The same is true in SCUBA diving but the pressure involved can get much larger. Of course there are ways in which the SCUBA diving kit and the diver themselves can deal with the pressure (such as ear-clearing to prevent barotrauma)
You can use a scuba tank, but that is it.
The numbers on a scuba tank reveal 3 things. Serial no. of the tank. Type metal. and the current hydro date.
Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.
Think on it a bit closer: -- The expansion is happening in the high-pressure reservoir, as some of the air leaves and the rest expands to fill the volume. So you'd expect the supply tank to cool as it empties. -- The compression is happening in the SCUBA tank, where you're continuously stuffing more and more air into the same volume. So you expect the SCUBA tank to warm as it fills.
a scuba tank is very thick, and so it wont be used if empty the valve remains to be closed, not allowing any air to excape, disallowing to be crushed. if the air cant leave the tank it wont crush.
I would think so, because there are two of them mixed together. Air in a scuba tank or anywhere else should be heterogeneous. A scuba tank filled with either oxygen or nitrogen would be homogeneous.
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
A standard-sized SCUBA tank holds 72 cubic feet of air at the standard pressure of 2250 PSI.
the silly answer is you can store anything in a scuba tank that you can get in it!!. BUTthe serious answer is scuba tank were designed for compressed air and nothing else... using a scuba tank for natural gas is like driving around with a bomb in your car!!, the valves and collars of the bottles are not strong enough if there was a crash
The vest is simply called a scuba vest. It's to hold your air tank and regulators :)
The diver uses an air tank, which is a tank filled with compressed air. It has a hose that goes from the tank to the mouth, which is held in the mouth by a 'mouth piece'. The tank has a regulator that allows the pressure in the tank to be regulated down for normal breathing.
While SCUBA diving you are wearing a fabric vest that is known as your boucency compensator or your B.C. This also happens to be the vest that keeps your tank attached to your back. When you wish to float to the surface, you slowly put air (from your tank) into your BC. The air released in the vest is much less dense than the water and thus it travels to the surface pulling you with it.