Wiki User
∙ 2009-12-21 17:05:48Scuba divers also wear lead weights on a belt
Wiki User
∙ 2009-12-21 17:05:48they have weight belts
Generally compressed air (oxygen 20 % and nitrogen 80 %; for other mixtures see the link bellow.
Some advanced divers dive using gas mixtures including Helium.
There is a certain mixture of helium and oxygen that has been used in SCUBA tanks for divers that are going to be very deep for prolonged periods (say, 200 feet down for 25 minutes). It helps to prevent bends upon decompression. There is no chemical reaction between these two elements.
Oxygen tanks have oxygen gas which is compressed and tightly sealed in the container.
they have weight belts
Most SCUBA divers dive with compressed air, which is normal atmospheric air compressed into a scuba tank.
Generally compressed air (oxygen 20 % and nitrogen 80 %; for other mixtures see the link bellow.
it doesn't affect the tank
By oxygen tanks - similar to SCUBA divers.
SCUBA tanks are metal (usually steel or aluminum) that are filled with compressed air. This is loosely related to a pneumatic system.
It definitely would. Also, a tank filled with non-compressed air would be nearly impossible to use because air wouldn't flow out of it without an enormous amount of effort. For these reasons, all tanks used by divers are filled with compressed air.
Some advanced divers dive using gas mixtures including Helium.
Because fish have gills and can breathe under water and humans do not
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
The majority of gas used in most SCUBA tanks is compressed air. This air is composed of the same elements everywhere - 21% Oxygen 79% Nitrogen. Advanced SCUBA divers may use an "enhanced" mixture of 32% (up to about 40%) Oxygen with the balance being Nitrogen. The number of divers who use a mixture like this is about 2 to 5% of all certified divers. Less than 1% of all divers may use a special Tri-mix of some rather exotic gases to allow very deep dives - however, it takes years of instruction and training to use these exotic mixes.