Primarygun Posted September 10, 2004 Share Posted September 10, 2004 In the deep ocean, assume the pressure is about 10 atm , while the pressure at sea level is 1 atm. The density of the deep ocean water is slightly different from the sea level water. What will happen if the deep ocean water is carried at the sea level, expand or others? Also, if the density doesn't change, how the pressure applying towards horizontal in the deep ocean water work out? Like a man goes into the deep ocean water level, he feels that six direction force exerts on him, how do the four forces work? Link to comment Share on other sites More sharing options...
Skye Posted September 10, 2004 Share Posted September 10, 2004 The water will expand as the pressure surrounding it decreases. I'm not sure what you mean in the rest of the post. Link to comment Share on other sites More sharing options...
pulkit Posted September 10, 2004 Share Posted September 10, 2004 If you want to calculate the pressure, you will need to integrate. The net force on the any body submerged will be vertically upward through the centroid of the volume submerged (Bouyancy). Link to comment Share on other sites More sharing options...
Primarygun Posted September 11, 2004 Author Share Posted September 11, 2004 The water will expand as the pressure surrounding it decreases. I'm not sure what you mean in the rest of the post. Why will the water expand? Isn't the density is nearly the same? Link to comment Share on other sites More sharing options...
Thales Posted September 11, 2004 Share Posted September 11, 2004 The water expands because it is under less pressure. It also expands because the surface currents are warmer and warmer water occupies more space than cooler water. The sinking/rising of the water is what drives the gloabl weather system. I don't see what it has to do with electricity (thread title). Link to comment Share on other sites More sharing options...
Primarygun Posted September 11, 2004 Author Share Posted September 11, 2004 Oh Sorry. I typed the title wrongly. It should be "hydrostatics mechanics" By the way, a geographical question, is the lower part of ocean being so cold because of the sunlight largely but slightly by the weight? Link to comment Share on other sites More sharing options...
swansont Posted September 11, 2004 Share Posted September 11, 2004 Why will the water expand?Isn't the density is nearly the same? The compressibility of water is only about 45 parts per million per atmosphere. It will expand, but not by much. This is why you use water for testing pressure vessels. If you spring a leak, the water will return to atmospheric pressure without expanding much. Link to comment Share on other sites More sharing options...
Dave Posted September 11, 2004 Share Posted September 11, 2004 Oh Sorry. I typed the title wrongly.It should be "hydrostatics mechanics" By the way' date=' a geographical question, is the lower part of ocean being so cold because of the sunlight largely but slightly by the weight?[/quote'] I think it's to do with the sunlight. Link to comment Share on other sites More sharing options...
Primarygun Posted September 12, 2004 Author Share Posted September 12, 2004 Thank you. Link to comment Share on other sites More sharing options...
Guest beholdasun Posted September 17, 2004 Share Posted September 17, 2004 Water is virtually incompressable (The compressibility of water is only about 45 parts per million per atmosphere - swansont). Meaning that at your 10 atm water will be about .00045 % compressed BY PRESSURE. The major factor affecting the density of water, however, is its temperature. The deeper you go, the less rays of sunlight come through to convert radiant energy into thermal energy. This is because more and more of them are absorbed by the increasing amount of the water above. In this case, the effect of increased depth results in a compression due to temperature and pressure, so it should be obvious that the water will be more dense at deeper levels. If you're still interested...here's a good resource <http://www.windows.ucar.edu/tour/link=/earth/Water/density.html&edu=high> "As far as the laws of Mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality" - Albert Einstein Link to comment Share on other sites More sharing options...
Martin Posted September 17, 2004 Share Posted September 17, 2004 By the way, a geographical question, is the lower part of ocean being so cold because of the sunlight largely but slightly by the weight? by weight you mean density, and the way density depends on temperature. That is an interesting question---what makes the temperature structure of the deep ocean layers? I do think the temp of deep ocean depends very much on the fact that the temperature of maximum density is a few degrees above freezing down to a certain point, like 4 Celsius, as water gets colder it gets denser so the colder water will sink and the warmer will rise but below a certain point that is reversed, and as water gets still colder (below like 4 Celsius) it expands and gets less dense and actually will want to rise! so I guess below a certain depth sunlight is sort of irrelevant. it doesnt penetrate and it doesnt affect the physics of the water way deep. then what you have is factors like salinity and different deep currents from different places moving around, and above all this incredible thing that below a certain temp water EXPANDS as it gets cooler----these I guess would be the factors that would influence the structure of the deep ocean Link to comment Share on other sites More sharing options...
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