The specific gravity, s, is the relative density of a substance with respect to water
swater = 1,
obviously!
What good is specgrav?
This is good if we have the s of two liquids and their volumes, we can quickly work out the specific gravity of the mixture
100ml of water and 10ml of Hg (s = 13.6) are mixed together,
find the specific gravity of the mixture.
sV / V = s = 236 / 110
•If you can do this then it is possible to quickly determine the density of a mixture of liquids!
•If s > 1 it sinks, if s < 1 it floats!