Marine Mammals density project

It's common inquiry why marine mammals can both dive but also float to the surface.
We are here to answer your questions.
The of ocean water
1027 kg/m3 or 1.02-1.03g/cm3

Q1: what is neutral buoyancy? How do these mammals of the sea achieve neutral buoyancy?

A: NEUTRAL BUOYANCY IS A WORD USED TO DESCRIBE SOMETHING THAT FLOATS AS MUCH AS IT SINKS. THIS IS ACHIEVED WHEN SOMETHING IS THE SAME DENSITY OF THE LIQUID ITS IMMERSED IN THE CAN DO THIS BY COLLAPSING THEIR LUNGS.

Q:2
HOW CAN THESE ANIMALS DIVE WITH SUCH EASE WHEN THEY ARE SO LARGE?

THEY CAN DIVE WITH EASE BECAUSE THEY HAVE THE ABILITY TO MAKE THEMSELVES MORE DENSE THAN THE OCEAN BY COLLAPSING THEIR LUNGS.

What is the relationship between the density of the ocean and the density of the marine mammals?

It's obvious that the marine mammals must be less dense than the ocean since it is such huge body of water. But, they also have the abilities to make themselves more dense than the ocean causing them to sink deeper into the sea. The way they can do this is they collapse their lungs to make them more dense than the ocean.

SOURCES

• http://biology.stackexchange.com/questions/23709/how-do-marine-mammals-cont...
• http://www.sharktrust.org/en/neutral_buoyancy
• http://discovermagazine.com/2001/aug/featphysics