At what depth of sea water is the pressure equivalent to 1 atmosphere?

When discussing the relationship between water depth and pressure, it's essential to understand that pressure increases as you descend underwater due to the weight of the water above you. One atmosphere (atm) of pressure at sea level is equivalent to approximately 14.7 pounds per square inch (psi) and is exerted by the weight of the atmosphere.

In water, pressure increases by about 0.43 psi for every foot of seawater depth. To translate this into atmospheres, we can note that 1 atmosphere is roughly equal to 33 feet of seawater. Therefore, for every 33 feet of descent, the pressure increases by one atmosphere.

Thus, at a depth of 33 feet, the pressure is equivalent to 1 atmosphere due to the water выше it. This is why the correct answer is the option that states 33 feet, as it's the depth at which the pressure matches that of the atmosphere at sea level, comprising both the atmospheric pressure and the hydrostatic pressure from the water column.