Wood and styrofoam, to name two.
oil
It is waters greater density than air that allows some substances to float on water.
more dense substances sink, less dense substances float. oil will not sink in water, it will float, it is less dense.
not me thats for sure i love first
Yes, if it makes the water denser, the boat will float easier. For example, it is easier to float in salty water.
I suspect that "flow" is meant to also be "float", but even with that substitution, it just changes the question from nonsensical to counterfactual.Most things that float in water do not float in air.
Any object with a density lower than 1 g/cm3.
Many combustible substances (substances that will burn) are lighter (less dense) than water and will float - paper, wood and gasoline are a few examples. When ignited (set on fire), these substances will continue to float, and so will the fire.
Objects with higher densities than water will sink in water. What they do in other substances depends on the densities of those substances.
Soild water
If you think about it, you can figure it out. Does one of the substances float in water and the other one sink?
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.