Well, the air in the tank doesn't compress any more the deeper you go, because the air in the tank is already extremely compressed, so it actually expands when it comes out of the tank, but there's a difference on how much it expands depending on your diving depth. When your tank is full, the air is pressurized to 3,000 atmospheres, so when you take a breath on the surface the air expands 3,000 times. If you were to take the same breath 10 meters under water the air would only expand half of that or 1,500 times. This means you would need to take in twice as much air at 10 meters depth then you would at the surface. To make it simply, the air in the tank does not change pressure as long as it remains in the tank, as long as it remains in the tank. Once it comes out of the tank it expands, but it is relatively compressed when compared to the surface.
You can use other gases, but they either have a higher narcotic-factor, are way heavier or way more expensive than nitrogen, therefore being still in use.
The air we breath everyday is 79% nitrogen and 21% approximately, and unless you are doing an advanced dive, then your scuba tank has compressed air inside. That's why. Also, oxygen can become toxic at certain depths, that's why we simply don't dive with oxygen. For example, today I made a dive with 32% oxygen and 68% nitrogen in my tank, known as Nitrox 32, my depth limit was about 107 feet, if I was to dive any deeper I would run the risk of getting oxygen toxicity. Anyway, this doesn't matter because oxygen has the same narcotic effect. To avoid narcosis you can introduce helium into the mix, but then it becomes very very expensive and it makes no sense to use helium for your typical dive for this reason, its about $1,000 compared to $5 for air or $7 for Nitrox.
Lovely. Love the way he speaks!💫
0:54 how can air in the tank be compressed if tank is made of metal ?
I don't think he means the gases in the tank itself, but in the lungs, where the gas-mixture gets to from the tank.
Well, the air in the tank doesn't compress any more the deeper you go, because the air in the tank is already extremely compressed, so it actually expands when it comes out of the tank, but there's a difference on how much it expands depending on your diving depth.
When your tank is full, the air is pressurized to 3,000 atmospheres, so when you take a breath on the surface the air expands 3,000 times. If you were to take the same breath 10 meters under water the air would only expand half of that or 1,500 times. This means you would need to take in twice as much air at 10 meters depth then you would at the surface.
To make it simply, the air in the tank does not change pressure as long as it remains in the tank, as long as it remains in the tank. Once it comes out of the tank it expands, but it is relatively compressed when compared to the surface.
Any why they use nitrogen with oxygen if nitrogen causing this issue ??
You can use other gases, but they either have a higher narcotic-factor, are way heavier or way more expensive than nitrogen, therefore being still in use.
I think they use helium
The air we breath everyday is 79% nitrogen and 21% approximately, and unless you are doing an advanced dive, then your scuba tank has compressed air inside. That's why. Also, oxygen can become toxic at certain depths, that's why we simply don't dive with oxygen.
For example, today I made a dive with 32% oxygen and 68% nitrogen in my tank, known as Nitrox 32, my depth limit was about 107 feet, if I was to dive any deeper I would run the risk of getting oxygen toxicity.
Anyway, this doesn't matter because oxygen has the same narcotic effect. To avoid narcosis you can introduce helium into the mix, but then it becomes very very expensive and it makes no sense to use helium for your typical dive for this reason, its about $1,000 compared to $5 for air or $7 for Nitrox.
why is a 12 year old drinking a martini???