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(c) Breathing in lowers one's average density and breathing out increases one's average density. ... more (c) Breathing in lowers one's average density and breathing out increases one's average density. Because denser objects float lower on the surface than do less dense objects, a floating person will oscillate up and down on the water surface as he or she breathes in and out.
(c) Breathing in lowers one's average density and breathing out increases one's average density. ... more (c) Breathing in lowers one's average density and breathing out increases one's average density. Because denser objects float lower on the surface than do less dense objects, a floating person will oscillate up and down on the water surface as he or she breathes in and out.