For normal "sport" diving, Scuba tanks are filled with just plain old air! That's just the mix of gases you're likely breathing right now, and it contains 78% Nitrogen, 21% Oxygen, and 1% other gases.
But nitrogen can cause problems for divers ("bends" and "narcosis"). So for technical diving (below 100 feet), divers sometimes use Nitrox, less nitrogen than normal air, and more oxygen.
But even pure oxygen can be dangerous when breathed under pressure. In fact, breathing pure oxygen while scuba diving below 25 feet can be fatal!
So for very deep technical dives, the inert gas helium is often added into the gas mix; which can be heliox (oxygen & helium), or trimix (oxygen, helium, and nitrogen).
air, nitrogen, oxygen, trace gases, and sometimes helium
Its not really scuba diving but its considered scuba diving. Also known as the hookah system. its when you have a gas powered motor pumping fresh air to the person or person's diving below, there can be up to four people diving off of one hookah system. the benefit of this system is that there is no decompression time and you can be underwater pretty much all day if someone fills the gas tank on the engine pumping air. but you are kinda tied down to something so i don't think its true scuba diving.
The types of gas that a scuba diver can use are nitrox gas and pressurized, filtered air. These are the gases that they can use. The most frequently used gas for recreational diving is filtered air, but nitrox is used for tech diving, and for deep depth diving.
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
The air inside SCUBA tanks is, usually, just regular air that has been compressed and "jammed" into a tank. Some diving applications utilize gas mixtures of oxygen, nitrogen (and sometimes hydrogen).
Tanks are filled using an air compressor capable of producing over 3000psi coupled with a filtration system that purifies the air to a level acceptable by the Compressed Gas Association as breathable air for scuba. This is not a "do-it-yourself" project - Scuba Diving facilities are certified to fill tanks. Trying to do this yourself will result in deadly gas mixes and overfilling can rupture the tank or valve - in addition to harming (deadly results) anyone in the immediate area.
normal gas for scuba is 20% oxygen, 80% nitrogen. You can take a nitrox course, in which you are then qualified to use different blends of oxygen and nitrogen. i.e. 40% oxygen and 60% nitrogen
by analyzing the experimental data it is clear that the relation of gay-lussacs law is proportional to the volume of the given substance. Therefore gay-lussacs law is related to scuba diving.
Some advanced divers dive using gas mixtures including Helium.
Not necessarily. It just depends on what someone means. Scuba diving is only when you use a scuba tank or cylinder that a diver carries. Deep commercial divers will often get their breathing gas supplied to them through a long umbilical hose ... so they are attached and do not carry Self Contained equipment that they can swim with like a SCUBA (self contained underwater breathing apparatus) diver.
No, you do not have to go to college, but you do need specific training. They usually have this training at something like a YMCA or something similar. This training, while expensive, allows you to take multiple dives, lessons, and a test to get your diving certification card. This card allows you to dive, but you should never (I repeat, NEVER) go diving alone. This card allows you to get scuba gear and gas for scuba diving.
Helium is a very light gas that is non-flammable so it is primarily used for balloons. However, it is also mixed into oxygen for SCUBA diving at certain levels.
Nitrogen and Oxygen are present in normal air we breathe every day along with other elements. Nitrogen makes up about 78% of the air and oxygen about 20%. Other elements include argon, boron and some others but these make up about 2% between them. Normal air is used in SCUBA tanks as it is the air we are used to breathing. This does have certain limitations in SCUBA diving and due to the high amount of nitrogen which means that the body takes on nitrogen much faster. In response to this, some divers use special gas mixes called Nitrox which have a lower amount of Nitrogen but higher Oxygen content which in turn means that divers can get more bottom-time. There are other gas mixes which some specialist divers use such as heliox, trimix and in some cases pure oxygen but these are all used more rarely and not so much in recreational diving
It is extremely light and non-flammable so ideal for balloons. It is an ideal carrier gas for Gas Chromatograhy for laboratories all over the world. At certain pressures when scuba diving it is used with oxygen to breathe.
The best answer is probably no. Safe scuba diving relies heavily on a knowledge of physics, gas laws and even physiology. Since it generally takes place in the ocean, it often involves marine biology. In that respect scuba is far more reliant on science than most other activities. Generally, though, scuba is a recreational activity for most divers and a vocation for others.
For recreational divers, the deepest limit of 130 feet (40 meters) is set due to narcosis primarily and breathing gas restraints secondarily.
Oxygen can be compressed and using a diving situation either in a mix with other gases such as in normal air or special mixes i.e. Trimix, Nitrox etc. Or it could be compressed and used on its own. Compressed oxygen on its own is usually only used in rebreathers where the exhaled gas is reoxygenated. In short, oxygen can be compressed on its own or with other gases for use in SCUBA diving
they need protection in water from dangerous animals also there is a problem in breathing so they carry gas cylinder.
Boyle's law states that absolute pressure is inversely proportional to the volume of a gas. This principle is used in several applications such as in scuba diving, pistons on bicycle pumps and the popping of ears at high altitudes.
The pressure of the gas will double. However, whenever a gas is compressed, it heats up, so the temperature will also increase, unless you are actively cooling the container. This is why when scuba divers refill their air tanks, the tanks are kept in a water tub with flowing cold water; otherwise, the tanks will heat up.
To fit more in. If it was at 1 atmosphere of pressure it would be like breathing out of a bag. (You would run out of air in about 5 or 6 breaths) Addendum: I should add that it's not oxygen in SCUBA tanks; it's air. Oxygen when delivered under pressure, can cause convulsions. You'll never see a diver with oxygen in her tanks.The above is correct, however oxygen is used by technical divers during decompression at very shallow depths. But this is not what is in the divers main gas or bottom gas.
There is at least one area in diving where the weight trade off might be a positive, and that is in rebreather diving. Using even aluminum tanks in some units will make a diver extremely negative when using a wetsuit, especially when necessary trim weights are added to the top of the unit to maintain horizontal trim. This results in much faster use of diluent just to fill the BC just to offset the negative bouyancy. A lightweight carbon fiber tank would be a great benefit. Even if the maximum pressure could not be obtained, as long as the gas volume was sufficient at 3000 psi, this would be an improvement over traditional metal tanks.This has been talked about before - its a weight trade off. Your tank may be lighter but you'll need to weight down more somewhere else to make up for it.But they do use them in TurkeyBecause scuba tanks must be certified to be filled with compressed gas (usually compressed air) they have to be inspected by instruments with currently only inspect metal tanks. The tanks are manufactured in one of two alloys - pressed steel or aluminum. Even if you could find a manufacturer of a carbon fiber tank - you would not be able to get it filled at any SCUBA facility.
helium is a noble gas, it doesn't get made into anything. It's used to inflate balloons and blimps since it's lighter than air. It is also used in some (very deep) scuba diving.
Poison gas (of several varieties, including chlorine, mustard gas, and phosgene) was used in WW I, but tanks weren't used until WW II.
The interesting thing about scuba diving, is legally, there are no licenses or certifications required. The problem arises, however, that while scuba is an extremely safe sport, some training is required to make it safe. And from a liability standpoint, dive shops, and dive resorts will not rent gear, or take people diving unless they can show a scuba license (or C-Card - certification card) from a recognized training agency.You can take classes locally or online that teach scuba diving, and upon graduation from the class, a certification card (which resembles a credit card) with your name, date certified, etc is given. That card will be required in most any location in order to dive.There are different levels of certification, Open Water Scuba Diver, Advanced Scuba Diver, Rescue Diver, Divemaster, Instructor, etc, and by taking additional classes, someone can gather more experience, education and certifications.Beyond recreational diving, there are courses for technical diving including deep, mixed gas, cave diving, etc, and there are also commercial dive courses covering everything from underwater welding, inspection, etc.