yes it does float because it has less density. Therefore it will float.
No, a coin can not float on gasoline.
The fats (i.e. cream) from the milk will dissolve in the gasoline and the the resulting gasoline/cream solution will float on the water from the milk.
Float. Gasoline is less dense than water.
yes
Yes
Gasoline
sink
Glycerin
Diesel fuel mixes with gasoline.
Oil/petroleum (gasoline?) will float on top of water as well.
No, the density of frozen water is less than petrol's.
In my experience if allowed to sit still they will separate, gasoline to the top.