2006-07-31 00:26:17 · 19 answers · asked by hickskicks 5 in Science & Mathematics ➔ Other - Science
Liquids of different densities (that dont become a solution) separate into layers...Density is measured in kg/m³ meaning....kilogrammes per cubic metre.Pure waters density is 1000kg/m³...therefore one cubic metre of pure water weighs one metric tonne. Oil is usually around the 800kg/m³ area (as there are many oils wich all have different densities) this means a cubic metre of this oil is 800 kg. Therefore the lighter less dense fluid floats to the top...Just like helium is lighter than air, a balloon full of helium would fly upwards, as oil does in water.
hope this helps ;-)
ps...for reference sea water is usually 1015kg/m³. Also, density of fluid affects bouyancy of an object...did you know if a ship moves from sea water to river water the ship will sink slightly. This is because to allow the ship to continue to float, the weight of the water displaced by the ship...must equal the weight of the ship. As density of fresh water is less than sea water, the ship has to sink a little further into the water to displace the extra 15kg per m³. So, mariners must calculate a fresh water allowance if they plan to go from sea water to fresh water, to prevent the ship from becoming unstable in the fresh water.
2006-07-31 00:40:39 · answer #1 · answered by Anonymous · 9⤊ 1⤋
Thank you for those answers. I am commenting to say that I did visit this page seeking the same answer to the questing "Why oil water float on water". So having read the answers it got me to thinking of another question. As about two thirds of the human body weight is made up of water. What is likely to be the affect of a person jumping in or falling in to a lake (or vat) of deep oil (Say about 30 meters deep). I think that mathermatically the human body is overall a little bit lighter than the oil. But obviously the body would sink faster and deeper than it was in water. Would the person be able to swim to the surface? I realise there are different grades of oil also. Some seem much thicker than others. Are the ones which are thicker (Greater viscosity) more dense than the thiner ones? Thank you.
2014-08-07 07:48:12 · answer #2 · answered by ? 1 · 1⤊ 1⤋
Because specific gravity of oil is less than the water so oil types material in normal condition can not mix or solve with water and float on top of water.
Hope that this will aknoledge you enough. F.Heidari
2006-07-31 01:02:00 · answer #3 · answered by F.H 1 · 1⤊ 1⤋
Because the density of oil is less than water
2006-07-31 01:10:48 · answer #4 · answered by praveenvis 1 · 1⤊ 0⤋
the density of oil is less than the density of water ,that's why it floats on the top of water.
2006-07-31 00:32:20 · answer #5 · answered by sarah 3 · 0⤊ 1⤋
Density of water is 1000 kg/m3. The desity of oil is lesser than that. Thus, Oil floats!
2006-07-31 00:31:36 · answer #6 · answered by Artin 3 · 0⤊ 1⤋
Oil is less denser than water. So oil floats on top of water.That is why during oil fires, water cannot be used to extinguish the fire.
2006-07-31 01:14:51 · answer #7 · answered by Anonymous · 2⤊ 0⤋
oil has a less density than water, so it float in water
2006-07-31 00:49:59 · answer #8 · answered by vairam m 1 · 3⤊ 0⤋
Because the density of water is more than that of oil...
2006-07-31 00:32:01 · answer #9 · answered by Deep 4 · 0⤊ 0⤋
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Things that float on water are less dense than water.
2016-04-08 06:31:48 · answer #10 · answered by Anonymous · 0⤊ 0⤋