Friday, December 18, 2009

Which is more dense: Salt water or cooking oil?

this is for my projectWhich is more dense: Salt water or cooking oil?
Salt water (seawater and salted cooking water) are both more dense than tapwater, which is generally more dense than vegetable oils.





Whether these are also lighter than ';cooking oil'; depends on whether that cooking oil comes from animals or not. Plants use liquids throughout; but animals store fat for long periods: their fats, therefore, are *saturated* with hydrogen atoms, to make them straighter and more compressable. (Unsaturated fats have kinks in them, so they can't pack together so easily.)





In turn, those sorts of fats tend to be solids at room temperature. I don't know whether their density is still less than that of water, but I doubt it. (I don't have butter or steak cuttings on hand to check -- sorry. If you have access to butter, cut off a slice and toss it in a glass of water -- if it floats, then it's less dense; if it sinks, then it's more dense.)





Assuming that the solid phase is more dense and the liquid phase is less dense, then the answer is ';it depends on the composition and temperature of your oil.'; But for vegetable oils, the general answer is ';the oil is lighter; the water is more dense.';Which is more dense: Salt water or cooking oil?
Salt water is more dense than tap water. Tap water is more dense than vegetable ( and animal ) oils. Salt water is even more dense than all raw petrol types. This fact is used to get petrol from wells. This fact also is the reason for sea shores pollution due to the release of petrol from ships that transport it.

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