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Density is mass per unit of Volume.
- A 'heavy' substance should really be described one which is of high density.
- A 'light' substance should be described as having low density.
- You can calculate the density of a substance by dividing the mass of a substance by the volume it occupies.
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| The Unsinkable Ship |
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| ~The Titanic~ |
It is not very hard to shape a boat in such a way that the weight of the boat has been displaced before the boat is completely underwater. The reason it is so easy is that a good portion of the interior of any boat is air (unlike a cube of steel, which is solid steel throughout). The average density of a boat -- the combination of the steel and the air -- is very light compared to the average density of water. So very little of the boat actually has to submerge into the water before it has displaced the weight of the boat.
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