It depends, using an average 12l tank (230 psi) if you are a heavy breather it will last for over an hour, and a light breather normally under 2 hours but you are recommended not to dive for over an hour
Let's consider a 10L tank full of air at a pressure of 200bar. That's 200x10=2000 litres. You'd need a BIG tank to hold 2000L. At depths we breath more air, so 2000-2400 is an average amount of air a diver would take down for an hour's recreational dive
The length of time a propane tank lasts on a hot air balloon depends on several factors. These factors include the size of the tank, the operator's discretion, and wind. Most last several hours.
6 to 8.5 hours during space walk
Scuba diving tanks or cylinders are usually made of steel or aluminium. You can also get light weight high pressure cylinders made out of thin aluminium with carbon fibre on the top. These are often used by fire fighters.
Can not answer this question. Need to know:Size of air tankWho or what we are supplying the air too.Finally are we reusing the air as much as possible or using a total loss system like scuba divers use.
Compressed air tanks were around long before paintball.
It all depends on how good the seal is but usually not more that a few hours. Besides it is not recommended that you leave a C02 powerlett in the air gun when you are finished shooting it will eventually ruin the seal if you leave it pressurized for a long period of time.
In ocean water, all other factors being equal, you will expend your air in 20 minutes.
you can as long as you have a filter and a fish tank
yes.
Air Raids could last from just afew hours to a whole night.
Depends on the area of the building you put it in or if its outside it doesnt last long.