Because pressure increases the further down you go. A unpressurized tank would collapse under this weight. Actually, the pressure in the tank is not to prevent it from crushing, but to allow it the diver to breathe. The greater the pressure in the tank, the greater the amount of breathing air you have available. As ambient pressure increases (ie by descending), your lungs require more air to fill them, as you are then breathing compressed air into your lungs. If you tried to breathe atmospheric pressure at depth, you could not fill your lungs. The deeper you go, the harder it is to breathe... Try breathing through a 6ft snorkel to the surface, and see how difficult it is to inhale. Therefore, the tank is pressurised, 1/ to allow you to breathe effortlessly at depth, 2/ to give you more time at depth, and 3/ to keep water out of the tank.
It's not the PRESSURE we want ... so much as the VOLUME we want. The average tank (which is probably 2-3 cubic feet) holds SEVENTY TWO to EIGHTY cubic feet of air. That will hold the air at 3,000 psi. Pressure is also important, because the water is pressing on the chest, so it requires a higher air pressure to be able to inflate the lungs under water. At 30 feet, for example, twice as much pressure is required as at sea level.
Scuba divers require increased air pressures in their air tanks while diving because the pressure on their bodies increases.
The deeper you go below the surface the more water there is above you pushing down on you.
I think the answer is there is no oxygen in underwater
The weight of the water above you.
During the deep dive the divers body goes through immense pressure. The atmospheric pressure in the deep as one goes more deep it increases so the lungs of the diver has to do more work and also that if the diver comes up on surface faster ten the rate he went down then the helim would be formed in the lungs of diver which can be lethal.
It goes up.
As Bernoulli Principle says, the fluid pressure decreases when speed increases. So if a river speeds up when it's narrowing down, the fluid pressure goes down.
Volume increases! If pressure is kept constant then temperature and volume are directly related to each other.(Charle's law). It states that:V1/T1 = V2/T2
A diver must rise to the surface of the water slowly because of the changing pressures and if they simply rose straight to the top from deep down their brain and body wouldn't be able to cope with trying to equalise the pressure and they would either die or end up with severe problems. It is a way of trying to get your body to equalise the pressure and realise the pressure is lessening. When you go under water, you are putting the amount of pressure of water and the pressure from the land on top of you, that is a lot of pressure to get your body used to. One of the issues was the Benz; which would have them driven mad by the suddenness of the changing pressures.
During the deep dive the divers body goes through immense pressure. The atmospheric pressure in the deep as one goes more deep it increases so the lungs of the diver has to do more work and also that if the diver comes up on surface faster ten the rate he went down then the helim would be formed in the lungs of diver which can be lethal.
The deeper the diver goes, the higher the pressure is.
Boyle's Law explains how the water pressure increases as you hold your breath. For example, the deeper a diver goes, the higher the pressure and the harder it is to hold your breath.
The pressure increases.
More gas dissolves into the liquid.
The temperature increases when pressure increases. This is according to the law of pressure. This law mentions that pressure is directly proportional to temperature.
as pressure increases, temperature increases
Yes, the water pressure on a submarine increases as it goes deeper.
Submarine hulls are subject to sea pressure, and that pressure increases the deeper the submarine goes. There are design limits to the amount of pressure that a hull can take, and if that pressure is exceeded by diving too deep, the hull will fail and will be crushed.
It depends on how deep the diver goes, and what air blend the diver is breathing. There are dive tables that state how long a diver can stay at a certain depth before requiring decompression. The basic recreational diver typically breathes either air or Nitrox. There are separate dives tables for air and Nitrox.
because the pressure of our blood increases which goes to our heart and so when fainting the heart beat increases
a diver