@behindtheunreal: Why A Submarine Gets Heavier In Fresher Water When a submarine moves from salty ocean water into fresher water, the water is less dense and pushes up on the hull with less force. The crew pumps water out of the trim tanks to match the sub’s weight to the water around it. Sources: NASA JPL, Measuring the Density of Water: https://sealevel.jpl.nasa.gov/files/archive/activities/ts2ssac1.pdf Naval Undersea Museum, Salinity, Density, Buoyancy: https://navalunderseamuseum.org/wp-content/uploads/2020/07/Salinity-Density-Buoyancy.pdf California Coastal Commission, Buoyancy and Density: https://www.coastal.ca.gov/publiced/waves/waves_8.pdf Caltech Engineering & Science (1946), submarine ballast and trim tanks: https://calteches.library.caltech.edu/118/01/Sigworth.pdf Cambridge University Press, Concepts in Submarine Design: https://www.cambridge.org/core/books/abs/concepts-in-submarine-design/assessing-weight-and-size-of-variable-ballast/8A1581EF0C374A3DB0066B18BBAA4156 submarine, submarine physics, buoyancy, water density, fresh water vs salt water, how submarines work, trim tanks, ballast, submarine explained, science explained, how it works, physics explained, 3D animation, educational shorts, engineering explained, ocean science, naval engineering #submarine #buoyancy #physics #howitworks #science #3danimation #doyouknow

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Tuesday 03 November 2026 01:13:21 GMT