Ship’s Displacement

You could consider something similar to a ship is more dense than water, after all,it is constructed of metal which is for certain more dense than water, but, the ship is filled with air, which is much less dense than water, and compensates the difference.

That’s how come, when a ship gets a hole in it, it sinks. The water pushes out all the air and makes the entire density of the ship bigger. When the water, metal, and air inside the ship become more dense than the water outside the ship, the ship will sink.

FLUID DISPLACEMENT

In fluid mechanics, displacement takes place when an physical object is immersed in a liquid, pushing it out of the way and taking its place. The volume of the fluid displaced can then be quantified (measured), and from this the volume of the immersed object can be deducted (the volume of the immersed object will be precisely equal to the volume of the displaced fluid).