At what absolute pressure does a depth of 132 feet in saltwater exist?

To determine the absolute pressure at a depth of 132 feet in saltwater, it’s important to understand how pressure increases with depth in water. The pressure at sea level is approximately 1 atmosphere (ata), which is equal to 14.7 psi. For every 33 feet of water depth in saltwater, the pressure increases by approximately 1 ata due to the weight of the water above.

At a depth of 132 feet, the calculation for pressure involves the increase in pressure due to the depth of the water:

1. Start with the pressure at the surface, which is 1 ata.

2. Determine how many 33-foot increments fit into 132 feet:

[

132 , \text{feet} \div 33 , \text{feet/ata} = 4 , \text{ata}

]

3. Add this to the surface pressure:

[

1 , \text{ata} + 4 , \text{ata} = 5 , \text{ata}

]

Thus, the absolute pressure at 132 feet in saltwater is 5 ata, which makes the answer correct. This understanding