What is the absolute pressure at 66 feet in atmosphere/bar?

To determine the absolute pressure at a depth of 66 feet, it's important to understand how pressure increases with depth in a fluid, specifically in seawater. The pressure exerted by water increases approximately by 1 atmosphere for every 33 feet of depth due to the weight of the water.

At sea level, the atmospheric pressure is about 1 atmosphere or 0.1013 bar. To find the pressure at a depth of 66 feet, you start with the atmospheric pressure and then add the pressure increase caused by the water column above.

First, calculate how many atmospheres of pressure are added due to the water:

• 66 feet divided by 33 feet per atmosphere gives 2 atmospheres of additional pressure from the water itself.

Next, add the atmospheric pressure:

• 1 atmosphere (at sea level) + 2 atmospheres (from the depth) equals 3 atmospheres.

Since 1 atmosphere is approximately equal to 1.013 bar, the total pressure in bar can be calculated as:

• 3 atmospheres x 1.013 bar/atmosphere ≈ 3.03 bar.

Therefore, at a depth of 66 feet, the absolute pressure is 3.03 bar, making this