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Hey, is there an equation to work out what the pressure is at given depths under water?

Basically, I have a set of results showing the volume of 'some' air increasing as the pressure is changed. I know that pressure x volume is constant. I need the above equation to explain how my results occured. (as well as to see how accurate my experiment was)!

One thing that I have been told that the pressure increases by 1 atmospheric pressure unit every 10m under water, however I don't know what the magnitude of the atmospheric pressure unit is in terms of pressure (to be used in the pV = nRT equation).

My guesses from what I've been told is that... Pressure = 1/10 * depth (in meters) * atmospheric pressure unit

Any help would be greatly appreicated, thanks!

Basically, I have a set of results showing the volume of 'some' air increasing as the pressure is changed. I know that pressure x volume is constant. I need the above equation to explain how my results occured. (as well as to see how accurate my experiment was)!

One thing that I have been told that the pressure increases by 1 atmospheric pressure unit every 10m under water, however I don't know what the magnitude of the atmospheric pressure unit is in terms of pressure (to be used in the pV = nRT equation).

My guesses from what I've been told is that... Pressure = 1/10 * depth (in meters) * atmospheric pressure unit

Any help would be greatly appreicated, thanks!

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