How is a submarine able to move throughout the water column by altering its density?
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Explanation:
When water is taken into 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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Answer:
the submarine attains negative buoyancy that allows it to submerge into the ocean depths.
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