Submarines have variable density.
When a submarine is in port, its overall density is less than that of water so some of it is above the surface of the water. They're made out of steel, which is more dense than water, but they're hollow; most of the volume of a submarine is air.
To make a submarine able to dive, they pump water into tanks. By adjusting the amount of water, they can make the density equal to water's density, which allows the boat to stay at a certain depth without expending energy to hold it up.
the overall density goes up.
The density will rise and submerge the submarine.
The water would have the same density anywhere it is.
Submarines have ballast tanks in them.........when it has to go deep down, the ballast tanks are filled with water, which increases its average density in regard to water(Relative Density).....and when it has to come up to the surface it empties the ballast tanks...and it rises. That's it.
Ice is less dense than liquid water.
Ice is less dense than liquid water.
It is greater than water. It sinks.
Average density of the object compare to density of water. If denser than water, it will sink.
Ships try to avoid sinking, submarines sink on purpose...
By their pumps and ballast-tanks: allowing water into the tanks to raise the vessel's density so can submerge, or pumping air into the tanks to displace the water and allow the submarine to surface.
Oil is heavier than water so it sinks to the bottom.
To determine the relative density of a substance, you can divide the density of the substance by the density of water. The relative density is also known as specific gravity and helps compare the density of a substance to that of water.