St-Lawrence:hmm: I thought it was St-Laurent?~?~?~?

"Water density"?

But water is not compressable; it is always the same density, however high the pressure.

???


Saline density?

I thought water density was 1g/ml and the water+salt( usually in sea) is 1,03g/ml. I think he was trying to say the density is not the same for (water+salt) because it depends on the weather and other factor like the concentraion of salt........

"In general density can be changed by changing either the pressure or the temperature. Increasing the pressure will always increase the density of a material. Increasing the temperature generally decreases the density, but there are notable exceptions to this generalisation. For example, the density of water increases between its melting point at 0 °C and 4 °C and similar behaviour is observed in sillicon at low temperatures."

"The density of pure water is a constant at a particular temperature, and does not depend on the size of the sample. That is, it is an intensive property. The density of water varies with temperature and impurities."

"Density is a measure of how much matter takes up a certain amount of volume (space)

When you add salt to water, the salt dissolves into ions. The volume increases a small factor, but the mass increases by a bigger factor. This is because the salt ions are attracted to the water and bind closely to the water molecules themselves.

But since the mass increases faster than the volume increases when you add salt, the density increases.

Salt Water is more dense than regular water because for a certain volume, there is more mass (more stuff) in the salt water than there is in the normal water. "

In the most liberal sense, water has density. Sea water contains solids so it is denser then fresh water. Density of a liquid is measured by specific gravity, with pure (distilled) water as the benchmark to which all other liquids are measured by. The more solids a liquid contains, the denser it is. My wife would agree that I am a lot more dense then water......

So yes, PG is correct when stating there are varying densities (total amount of dissolved solids, temperature and depth) when it comes to water (sea water that is). Other factors come into play, temperature being the biggie. The cooler sea water is the more dense it is. Swimming is a bit easier in sea water then fresh water because the higher density makes us more buoyant.

"I thought water density was 1g/ml and the water+salt( usually in sea) is 1,03g/ml. I think he was trying to say the density is not the same for (water+salt) because it depends on the weather and other factor like the concentraion of salt........"

You are correct. A strong, fresh water source, ie rain, river etc, will lower the the density or specific gravity of sea water. It dilutes the concentration of solids. You are adding more volume than mass. That along with temperature (colder is denser) is the reason for thermal layers. I could get a little more detailed but my eyes are getting a bit fuzzy.....

Owie! First time we are talking about science stuff which finally relates to games and real life!:smug: Im proud of you 1480:up:

I wish they could model the ineffectiveness of asdic at high speeds and after depth-charging in GWX. I fear it's hard-coded though. Sure makes things a lot harder.

Well thanks RP. Science has always been an amateur hobby of mine, would have pursued it academically but I hate advanced mathematics. Just explain the theory to me and I can sort it out in my head. Once you start with V x 7/RS - t2, I get dizzy. But I have to warn you, I'm in the "global warming is a natural event camp!"