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1 ATM is actually equal to mean sea level itself. Now if you filled a balloon with air and put it under the water, you would notice that the volume will decrease. This decrement will increase as you go further down. Since the volume is decreasing, pressure must be building up inside (PV=nRT), assuming that the temperature doesn't change. Thus undersea pressure will be higher than 1 ATM.

Addition

For water pressure alone, 10 meters of water is equivalent to 1 atmosphere of air pressure.

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What is the pressure if you 500 meters below sea level?

The pressure at 500 meters below sea level is approximately 5 atm (atmospheres), which is equivalent to about 73 psi (pounds per square inch). This pressure increases by approximately 1 atm for every 10 meters of depth.


How many meters underwater is one ATM?

Around 10 meters.


How do you calculate the pressure acting on an organism below the ocean's surface?

add 1 atm (atmosphere) for every 10 meters below the surface


How deep would you need to dive to experience a pressure of 2 ATM What would be the pressure at a depth of 100 m?

To experience a pressure of 2 ATM, you would need to dive to a depth of 20 meters (2 ATM = 1 ATM (surface) + 1 ATM (pressure at 10 meters depth)). At a depth of 100 meters, the pressure would be approximately 11 ATM (1 ATM at surface + 1 ATM for every 10 meters).


Is 2 ATM the water pressure at 20 meters?

Yes, 2 ATM is equivalent to the water pressure at a depth of approximately 20 meters underwater. This is because each additional 10 meters of depth adds around 1 ATM of pressure.


Why is the pressure at 14000 ft above sea level 0.69 ATM while the pressure at 14000 ft below sea level is 470 ATM?

The pressure at different altitudes depends on the weight of the air column above that point. At 14000 ft above sea level, there is less air above causing lower pressure (0.69 ATM). Conversely, at 14000 ft below sea level, there is more air above causing higher pressure (470 ATM).


3 ATM equals how many meters?

Atmosphere is a measure of pressure, not of length like the meter.


How much pressure is at 3000 meters below water level?

At a depth of 3,000 meters below water level, the pressure can be calculated using the formula: pressure = depth × density of water × gravitational acceleration. The average density of seawater is about 1,025 kg/m³, and gravitational acceleration is approximately 9.81 m/s². Thus, the pressure at this depth is roughly 30,000 kPa, or about 300 times atmospheric pressure (1 atm being approximately 101.3 kPa).


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.)


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10 ATM or 100 meters on a watch?

HI sir 10 ATM is 100M so it's the same thing..