What is the absolute pressure at a depth of 165 feet in salt water?

To determine the absolute pressure at a depth of 165 feet in salt water, it is essential to understand how pressure changes with depth. The pressure exerted by a column of liquid increases with depth due to the weight of the water overhead. One important fact to note is that the pressure at sea level is considered to be 1 atmosphere (ata).

In salt water, the pressure increases by approximately 0.445 ata for every foot of depth. Therefore, to calculate the total pressure at 165 feet, you can use the following formula:

1. Calculate the pressure increase due to the water:

• Depth in feet multiplied by the pressure increase per foot gives you the hydrostatic pressure.

• For 165 feet: 165 feet * 0.445 ata/foot = 73.425 ata.

2. Combine this hydrostatic pressure with the atmospheric pressure at the surface (1 ata):

• 1 ata (atmosphere at the surface) + 73.425 ata (hydrostatic pressure) = 74.425 ata.

However, converting to the correct total absolute pressure requires understanding that the calculations were incorrectly framed as they should consider total ata impact rather than being summed. The pressure at 165