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When water is taken in to the ballast tanks, the mass (and thus density) of the submarine increases and the submarine attains negative buoyancy that allows it to submerge into the ocean depths. Conversely, when water is released from the ballast tanks the vessel’s density decreases allowing it to surface.
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www.visionlearning.com/library/module_viewer.php?mid=37
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To control its buoyancy, the submarine has ballast tanks and auxiliary, or trim tanks, that can be alternately filled with water or air (see animation below). When the submarine is on the surface, the ballast tanks are filled with air and the submarine's overall density is less than that of the surrounding water.
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science.howstuffworks.com/submarine1.htm
science.howstuffworks.com/submarine1.htm
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Vertical stratification of sediment concentration is ubiquitous within submarine mass-flows, particularly those containing a wide range of grain-sizes with highly-variable settling velocities. Concentration stratification leads to stratification of density, viscosity and grain-size.
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gsa.confex.com/gsa/2001ESP/finalprogram/abstract_7066.h...
gsa.confex.com/gsa/2001ESP/finalprogram/abstract_7066.htm
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Turbidite flows are often triggered by Earthquakes, and they were first discovered after the 1929 Grand Banks earthquake, when density flows triggered by the 'quake flowed downslope at over 80 kilometres per hour and succesively broke a series of telephone cables laid on the seabed. ... Submarine channels off New Zealand:
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www.earthsci.unimelb.edu.au/mars/Turbidite.html
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In order to accomplish this, the students will use not only the concepts of mass, volume, and density but will also integrate buoyancy and ballast in their submarine design.
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www.learnnc.org/lessons/amykoonce12202004821
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In order to accomplish this, the students will use not only the concepts of mass, volume, and density but will also integrate buoyancy and ballast in their submarine design. By Amy Koonce.
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www.learnnc.org/lp/pages/3141?email
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Explanation of how the buoyancy of a submarine changes as the effective density of the submarine is increased and decreased. ... The effective density of a submarine is equal to the weight of the submarine hull and all things within it divided by the volume of the hull. The effective density needs to be near that of water.
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www.grow.arizona.edu/Grow--GrowResources.php?ResourceId...
www.grow.arizona.edu/Grow--GrowResources.php?ResourceId=197
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About the Office of Naval Research - Office of Naval Research ... ... Technology Strategic Plan describes ONR's investments in 13 technology focus areas that will ... ... Science & Technology Organization...
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www.onr.navy.mil/focus/blowballast/sub/work2.htm
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Decreasing the amount of water in its ballast tanks by replacing it with air lowers the total mass of the submarine; this decreases its density.
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www.worsleyschool.net/science/files/sub/marines.html
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