Thermo: Pls help. Find pressure difference between ocean surface and depth.?

First, go to a href="http://www.simetric.co.uk/si_water.htm" rel="nofollow"http://www.simetric.co.uk/si_water.htm/a and it will tell you about water density variance as a function of temperature. That being said, for every 10 meters you descend into salt water you incur another atmosphere of pressure, or 14.7 PSI. So how many 10s are in 600? Multiply it out. The surface of the ocean is at 1 atmosphere of pressure by definition, so if you are looking for absolute pressure at a depth of 600 m, you need to add in one additional atmosphere. If you are just looking for the difference, it is 60 atmospheres. Easy stuff.