A sperm whale has a pocket filled with an oil like substance at the top of its head. When it wants to dive down it allows cold water into this pocket causing the oil to solidify. When it wants to rise to the surface, it releases the cold water, causing the oil to melt. Explain why this works, based on what you know about density and buoyancy
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A sperm whale has a pocket filled with an oil like substance at the top of its head. When it wants t...
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