Question

3. How can submarines and whales sink and rise to the water surface at their own wil
own hydrometer? Explain in steps.​

Answer 1

Answer:

Explanation:

submarines use ballast that are filled with air or sea water in order to increase or decrease the subs density and cause it to sink or float, much as a whale displaces oxygen from its lungs in order to increase its density.

Answer 2

Answer :  Whales displaces oxygen from its lungs in order to increase its density such that they can sink and rise above the water surface , while the submarines uses ballasts filled with sea water or air such that they can increase or decrease the density of the submrine  and helps to sink or fl

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