Which is more dense: cooking oil or tap water?

Tap water....oil floats on water.





For the ones who say 'oil'...have you not seen an oil-slick on the sea?....If oil was denser than water it would sink....it doesn't!!...DUH!!!





Simple physics...anything denser than water sinks in water, anything less dense than water floats !!!





Try it for yourself to prove the thumb-downer wrong......put some vegetable oil in a jam-jar....pour in some water over the oil, ...the water sinks through and the oil floats on top...QED.Which is more dense: cooking oil or tap water?
Id think oil. Because I doubt that oil is water free. Meaing that some precentage of oil is water. Oil is a least as dense as water. The effect of oil floating on water is a very convincing couter explanation thought...but ill stick to my guns





A counter to the explanation above would be that its not completely on density. It depedns on surface area of the object in water. It also may have something to do with the surface tension of the water.





Addition:





I looked up the chemical composition for oil and there is no water in there. What a large molocule ...it may still have something to do with surface area. But in keeping with simplicity it seems that water may be more dense.





In the end i am unsure.Which is more dense: cooking oil or tap water?
Tap water depending on the Temperature of the water. The hotter the water the less dense it is. Also, if the water is frozen (ice), that too is less dense than room temperature water. Just saying.
Cooking oil. Water doesn't penetrate oil.
Depends on the type of oil but oil is thicker then water.
tap water