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If the gas is normal air (~20-22% oxygen), the maximum recommended depth of most dive organisations is in the region of 50-60m. The reason for this is that the deeper you go, the higher the pressure of the water. For example, on the surface, the pressure is 1 bar, 10m is 2 bar, 20m is 3 bar 30m is 4 bar etc.
Oxygen becomes toxic to the human body at about 1.6 bar so if you are at 70m, with a mix of 20% oxygen, you are at 8 bar of pressure. At 8 bar, the parital pressure of oxygen is 1.6 bar, enough to become toxic. So compressed air becomes dangerous at 70m so most organisations advise to go no deeper than 50-60m.
If you use a different gas blend, such as Nitrox ar Trimix, the amount of oxygen is different so the depths are different too.
In summary, on compressed air, the maximum is about 70m, recommended 50-60m max.
The deepest dive with Scuba breathing air is recorded as 155M by Dan Manion in 1994, although the safe limit is usually described as about 50M by diving training bodies such as BSAC, although most recognise this requires special training. Nitrogen narcosis can make deep diving very dangerous and other risks like decompression sickness increase with depth. At extreme depth oxygen can become poisonous.
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Before a diver dives will he will take a deep breath or hyperventilate?
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
Mixture of gases for scuba diving tanks compared to normal atmospheric air?
Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.
What exactly is scuba diving?
Literally, scuba diving means using diving underwater using Self Contained Underwater Breathing Apparatus.Conventional scuba equipment usually consists of a cylinder of compressed air (worn on the diver's back), and a "regulator" which converts the air from being highly compressed and delivers it to the diver at a breathable pressure.Scuba equipement also technically include rebreathers, which are a much more sophisticated form of diving equipment, whereby the air which the diver breathes is constantly recycled through a carbon dioxide scrubbing system.Scuba diving is now a popular recreational holiday activity, with over 10 million certified scuba divers worldwide.
What does psi mean in scuba diving?
the amount of air in the tank per square inch. (p.s.i.)Improve answerPounds per Square Inch - so the amount of pressure exerted on the tank by the air under pressure in the cylinder of the scuba diver. The more pressure, the more compressed the air so the greater the volume of air compressed within the cylinder.for more on scuba diving, including equipment see the related link:
How much time does a scuba diver spend under water?
It depends on how deep the diver goes, and what air blend the diver is breathing. There are dive tables that state how long a diver can stay at a certain depth before requiring decompression. The basic recreational diver typically breathes either air or Nitrox. There are separate dives tables for air and Nitrox.
How does the density of the air change in the Cartesian Diver experiment?
As the "diver" descends, air density inside the diver's capsule increases as it is compressed.
What can a scuba diver purchase from the Air Hog online shop?
A scuba diver can purchase many things for scuba diving at the Air Hog online shop. They can purchase dive knives, dive lights, dive computers, and dive bags which will help them in scuba diving.
How can a scuba diver suffer an air emoblism?
from holding their breath and ascending.
Is there scuba masks with oxygen in them?
Scuba masks do not contain oxygen. Instead, scuba divers rely on a separate piece of equipment called a tank or cylinder to supply compressed air or a breathing gas mixture for underwater breathing. The scuba mask's purpose is to provide a clear field of vision and to create an airspace for the diver's eyes and nose while underwater.
How can you fill a tank of compressed air without an air compresser?
You can use a scuba tank, but that is it.
How does scuba gear work?
Scuba stands for Self Contained Underwater Breathing Apparatus. It uses two regulators, one on the bottle which takes the volume of compressed air to a manageable rate, then the second regulator takes the air to a breathable rate so the diver can breath the air comfortable. The other part of diving is a divers buoyancy. This is controlled by using a hose which comes from the first stage regulator into a vest called a B.C. (Buoyancy Compensator). The goal of this device is to get you, the diver as close as possible to becoming neutrally buoyant (you don't go up or down, you just stay in the middle). However once neutral buoyancy is achieved it can still be affected through your breathing rate. Gregory L. Las Vegas, NV (D.I.T.)
Why does a scuba diver need increased gas in the air tank?
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
