Water does not respond to pressure as air does. Liquid, as opposed to gas, is not compressible. Applied pressure on water will go through the water without changing its density. Another difference is the weight; the water is, of course, much heavier than air.
If we repeat the example we used before, a pillar of water with a surface unit of 1 cm2 & height of 10 meters, containing 1,000 cc of water (1 liter) – weighs 1 kg.
his imaginary pillar of water applies pressure of 1 kg/ cm2, just like the air pillar we mentioned earlier. The difference is in height. 10 meters of water apply the same pressure the entire atmosphere exerts. Meaning, at a depth of 10 meters, the water exerts pressure of 1 atm, as well as the atmosphere's pressure upon the water. If so, at 10 meters below water, the surrounding pressure (the pressure in a certain environment) will be 2 atm. Since the density of water does not change, the rise of the environmental pressure will relate to descending under sea level. With every meter one deepens, the environmental pressure will grow by 0.1 atm. The added pressure when going deep is, then, 1 atm per every 10 meters. The environmental pressure is the sum of the atmospheric pressure + pressure due to the weight of the water.
There are two types of terms to define pressure, which we will see in literature about diving. "Absolute pressure" is equal to the environmental pressure. "Relative pressure" is equal to the added pressure caused by the weight of the water.
It is not possible to copy content from this course.
If the course is interesting you can share it with your friends
In order to take the following knowledge exem,
you must review all the topics of this chapter
In order to move on to the next chapter
You must pass the previous chapter exam.
In order to start the final exam
You must complete the entire course
To move on to the next chapter
You are required to pass the exam for this chapter.
This content can be viewed
Only by purchasing the full course
purchase this course
