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How much pressure does a diver experience at 30 meters depth in salt water?
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What is the pressure of ocean water at sea level?
Right at the surface of the ocean, the pressure is just the same as the air pressure at sea level; that is, one "atmosphere", or about 14.7 PSI (Pounds per Square Inch). But water pressure increases with increasing depth: For each foot of depth, the water pressure increases by 0.445 PSI. SCUBA divers, who need to be very aware their depth because of this pressure effect, often use this rule: Every 33 feet of depth, water pressure increases by one "atmosphere" (14.7 PSI). So, for example, at 66 feet the pressure on a diver is three atmospheres: There's one atmosphere of pressure from the air, and two atmospheres from the water.
What is the expected pressure of air in lungs of a diver at 4 meters below the sea level?
Air pressure (at sea level) is about 1 bar; every 10 meters below the water surface, pressure increases by about 1 bar - that gives a total of 1 + 0.4 = 1.4 bar. (1 bar is about 1 atmosphere.)
What part of a diver's body might be hurt during a deep dive and why is this so?
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.
Why do you think a person going to the depths of the sea requires a rigid diving suit instead of a flexible one?
A person going to the depths of the sea requires a rigid diving suit instead of a flexible one because of the extense pressure of the fluid. As we know that pressure at a point in a fluid is directly proportional to the depth of that point, thus, a deep sea diver needs a rigid suit.
How do divers float after sinking?
Scuba divers can hover at depths with proper buoyancy control. This is achieved when the diver wears the appropriate amount of lead weight to make them sink and has an equalized amount of air inside the buoyancy control device (BCD) to balance the sinking effect with air pressure in the bladder of the BCD & the divers lungs. When proper buoyance is achieved the diver can hover at depth and seem weightless while only moving slightly up or down in the water due to the controlled amount of air within their lungs all while still breathing appropriately at the given depth.
How deep in water is 3atm of pressure?
One atmosphere is the amount of pressure that can lift water approximately 10.3 meters.Considering that a diver already experiences 1 ATM of pressure in air, the water depth in meters d, at which the diver would experience n ATM of pressure, isd = (n - 1) * 10.3Hence, to experience 3 atmospheres of pressure, you'd need to go ((3-1) * 10.3) = 20.6 meters (67.6 feet) underwater.
What is the most pressure a diver can experience before getting the bends or decompression sickness?
The deepest depth that can be dived to (on air) and saturate and then surface without getting decompression sickness in general is about 20 feet (6 meters). This is known as the Minimum Bends Depth. Any depth greater than this depth can result in decompression sickness depending on the time underwater.
Why do free-divers sink at depth?
The cartesian diver sinks because the diver wants to get to a place of low pressure
How is decompression sickness related to pressure?
Divers breathing compressed gases at depth are themselves under pressure. For each 33 feet/10 meters that a diver descends, they add approximately 1 atmosphere of pressure to their body. When they breathe gases whilst their bodies are under this pressure, the gases dissolve into their bodies tissues. When they ascend, the pressure is relieved, and gases are released. Provided that diver ascends sufficiently slowly, the gases are released slowly and no problems result. But if the diver ascends too slowly without allowing the gases to expire at a slow enough rate, then the diver will suffer decompression sickness when gas bubbles form in the diver's tissues and blood.
How far can somebody be underwater before the pressue kills them?
The record depth for a scuba diver is 313 meters. That is probably about the limit before pressure changes when surfacing would prove fatal. A diver could probably go deeper without being killed but wouldn't get to the surface again alive.
How many atmosphere of pressure would a diver experience at 102 feet?
3 atmospheres
What is the average depth for the average scuba diver?
40 feet (12 meters) to 100 feet (30 meters).
Why scuba divers experience a higher pressure at the bottom of the sea than on the surface of the earth?
This is mainly do to the pressure that the water above the diver is putting on the diver. On the surface air is putting pressure on you but it has less weight than water and as you dive deeper the pressure increases because the amount of water above you also increases.
At what depth is oxygen toxicity harmful to a scuba diver?
The quick answer is that a diver breathing air should descend no deeper than about 218 feet of seawater due to concerns of oxygen toxcity. Here's the longer answer: Oxygen can become toxic to a diver as the partial pressure of the gas increases with increasing depth. The point at which this occurs varies based on the metabolism of the individual diver and time at depth. A general rule of thumb is 1.6 atm PPO2. The NOAA Diving Manual quotes the following maximum times at various oxygen partial pressures: 1.6 45 minutes 1.5 120 minutes 1.4 150 minutes 1.3 180 minutes 1.2 210 minutes It is important to understand that these are not fixed limits. An individual diver's reaction to high pressures of oxygen varies greatly. Most mixed gas rebreathers are set to maintain 1.2 to 1.4 PPO2, allowing for this variability. To understand what this means to a diver in terms of maximum depth, we need to understand how depth affects the partial pressure of oxygen. The partial pressure of any gas is the total pressure the gas is under, times the fractional percentage of the gas. Each foot of seawater increases the total pressure of the breathing gas by .030303 atm. This means that the total pressure at 33 feet is 2 atm (1 at the surface plus one of water). Total pressure at 66 feet is 2 atm, 99 feet is 3 atm, and so on. Since air is about 21% oxygen, the PPO2 of air is .21 at the surface, where the total pressure is 1 atm. At a depth of 33 feet of seawater, the total pressure is 2 atm, making the PPO2 (2 X .21) or .42. Accordingly a PPO2 of 1.6 is reached at about 218 feet of sea water. This depth, 218 fsw, is generally considered the maximum safe depth for a diver breathing air. The same formula can be used for other breathing gases. A diver breathing pure oxygen reaches 1.6 PPO2 at about 20 feet of seawater. A diver breathing Nitrox32, containing 32% oxygen, reaches 1.6 PPO2 at 132 feet. Note that much of this is moot for most recreational divers. Recreational dive training agencies set a maximum depth of 40 meters (130 feet) for a variety of reasons including avoidance of decompression illness.
What is the commmon depth for people to scuba dive?
It depends on your experience. The limit for recreational diving is 130 feet. However, a novice diver should not be diving near that depth. According to PADI, dives deeper than 60 feet are considered deep dives.
How does diving technology work?
The answer depends on the type of diving referred to in the question. Shallow-water diving, e.g., SCUBA (Self-Contained Underwater Breathing Apparatus), is far less complex than deep-sea diving. It requires only a tank of air and a mouthpiece for breathing. As the depth of the water increases, other factors such as water pressure arise. Including standard atmospheric pressure at sea level, the water pressure in salt water at a given depth can be approximately calculated by this equation (depth in feet, pressure in pounds per square inch - PSI): PSI = 14.7 + 0.434 x depth (ft) Example: at 100 ft of depth, 14.7 + 0.434 x 100 = 58.1 PSI. The records for "open circuit" (no rebreathers used) SCUBA diving is 1083 feet, set in 2005 by a fit, well-trained diver. That depth would kill the average diver. Another factor is decompression sickness, commonly called "the bends". This is caused by a diver ascending too quickly from a high-pressure depth to atmospheric pressure. Inert gases such as nitrogen that are absorbed by body tissues expand and create bubbles as the pressure decreases. If done too quickly, its effects can range from joint and muscle pains to death (rare, but...). Below a certain depth, the diver needs to be encased in an artificial environment. The atmospheric diving suit is essentially a personal sumbersible that totally isolates the diver from the water, allowing dives to 2000 feet or more. Pressure-wise, 200 feet = 882 PSI, which would crush an unprotected person. The suits operate at atmospheric pressure, ergo eliminating decompression and allowing normal air to be used. Since the usual public image of diving is SCUBA, the technology is fairly simple, as long as the necessary maintenance and safety procedures are zealously followed.
Where can I buy a reliable scuba diving watch?
Essentially, tests are done under static conditions and movement of the diver or the water will increase pressure on the watch. This could cause the watch to fail at that depth.
