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2007-09-27 10:38:03 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
First of all it is air. Oxygen becomes toxic around 20 feet.
Sencondly, if it was not compressed you would only be able to take a few breaths. Maybe 6 before you ran out of air. The standard compression is 3,000 PSI(Pounds Per Square Inch).
2007-09-27 10:42:59 · answer #1 · answered by Robert T 2 · 0⤊ 1⤋
Oxygen is not used in Scuba tanks.
It's compressed air. This is done to give much more breathing time when under water. The 'Regulator' controls the amount of air to the diver and, if it wasn't compressed, the diver would last no time at all on the tank's volume of normal pressure air.
A large volume of air is compressed into the cylinder which, as it is released under control, will last for 30 minutes or more. A gauge and an alarm is fitted to the cylinder to warn the diver when the air pressure is getting low to give him time to get back to the surface at a safe rate of ascent.
2007-09-27 17:53:09 · answer #2 · answered by Norrie 7 · 0⤊ 0⤋
To get more in the tank, so the diver can stay under water for much longer.
2007-09-27 17:43:04 · answer #3 · answered by Gervald F 7 · 0⤊ 0⤋