Answer:
Step-by-step explanation:
First you have to know the density of the liquid. The numbers range from 0.5 to about 2.
I the object you are putting into the liquid has a density greater than that of the liquid, then the object will sink (go below the surface of the liquid).
If the object has a density less than the liquid then the object will float.
If you take a chunk of solid iron, and put it water, there is no way that object is going to float (with one exception). Iron has a density of about 8. Water is 1. Water is the standard.
If you put balsa wood in water there is no way it will sink. It has a density much less than almost all liquids.
So you do you make iron ships float? The answer to that is that ships are not solid. The shell of the ship has a volume much greater than the thickness of the hull of the ship. The density would be calculated as 8 / huge volume -- say 1,000,000 cubic cm. (and that's not much of a volume.
The result is a density much less than 1. Iron ships really do float.