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Could life on earth if air contained only oxygen?
Not "life as we know it". Oxygen is poisonous, as all Scuba divers know; below about 30 feet depth, pure oxygen will kill you, and a few people react badly to oxygen in normal pressures. And without nitrogen and carbon dioxide, plants would be unable to live.
How much do scuba divers earn?
Not as much as they did in the 80's! LOL Well, its only fair... it got much safer since I did it
Why scuba divers use mixture of nitrogen and oxygen?
Most very deep dives are done in trimix, which is a mix of oxygen (actually very little of that), helium and nitrogen.For really deep dives, divers use heliox, which is a mix of pure helium and oxygen.And for really stupidly deep dives, divers use hyrdeliox(hydrogen, helium and oxygen).
What was the most scuba divers down at one place one time?
In Indonesia in 2009 a world record was set with 2,496 divers on a single dive.An optimistic attempt to beat the record was made later in 2009 in Ohio, but only 794 divers attended. However, that did set a record for a freshwater dive.
How long does a scuba diver go to college?
Recreational scuba divers only need to undertake a short course to be qualified (or "certified" using industry jargon). The certification process for a basic open water diver normally takes about 5-6 days.Commercial divers usually undertake some kind of vocational training, but this is not usually done through a college or university.
How do scuba divers explore the underwater world through bouyancy?
Buoyancy is not required in order for a SCUBA diver to explore the underwater world. It is required only when his session is complete, and he wishes to rise to the surface, replenish his survival resources, and live to explore on another day.
How much do scuba diving regulators weigh?
For bouyancy calculations, most regulators are assumed to weigh about 4 lbs. For recreational divers, they only carry one regulator, but technical divers may carry four (or more!) regulators on their doubles and various stage tanks.
Does atmospheric pressure have any effect on the oxygen level in the scuba tank?
No, only when it is released into the atmosphere at the ambient pressure.
Why cant a scuba filled with oxygen only?
Scuba tanks get hot when you fill them. Putting them underwater keeps them cool. If they overheat, the burst disk may blow. But even if it doesn't, a "hot" fill will cool down to a lower pressure, so if you think you have filled the tank to 3,000 PSI, when it cools down you will find that you only have, say, 2,750 PSI in your tank.
What element do scuba divers need to prevent the bends?
Scuba divers need to decompress after a deep dive so that the oxygen levels in their blood return to normal before returning to the surface. Otherwise they will get the bends. A scuba diver will typically use his or her dive table or computer to figure out how many minutes they must decompress before resurfacing from the dive. Decompression takes place when a diver figures out the amount of time they need to wait at a certain depth under water before they can resurface. They also need to take into account how much air they have left so they can safely wait underneath the water for said period of time. A scuba diver will usually hold onto a drop line and simply breath and wait the allocated amount of time at the prescribed depth and only then safely return to the surface.
Do scuba divers kill coral reefs?
They sometimes do cause damage to the reefs, but are not usually to blame for killing entire reefs; that is something that only larger forces can cause, such as climate change or a huge hurricane.
Why is it poisonous for us to breathe in oxygen only?
If you breath 100% Oxygen, it is not immediately poisonous and can be beneficial for a short time. However the human body has evolved to breath a gas mixture called air. Air is 80% Nitrogen and 20% Oxygen and if you breath a gas mixture significantly richer in Oxygen for a protracted period, then the Oxygen affects the functioning of most body systems and can lead to death. Also breathing Oxygen where the partial pressure of the Oxygen exceeds 1.2 bar, can cause acute oxygen poising resulting in convolutions. SCUBA divers need to take this into account when diving, especially on mixed gasses.
