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Satwik
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So I read that if you put grease on a needle it will float on water .
Why does this happen?
Why does this happen?
Satwik said:So I read that if you put grease on a needle it will float on water .
Why does this happen?
This is not why ducks float. Ducks float because they are less dense than water, like virtually all birds (around .6 to .8).Chavers said:Basically the same way ducks float above water due to there oily feathers.
Granted that it is a complex process, but it sounded like you were suggesting that ducks float for the same reason that a needle floats on the surface:Chavers said:The oil does more than prevent saturation and ducks are more evolved than simply they float because they're birds. They are able to change the buoyancy using air sacks and there lungs
Chavers said:... the weight of the needle isn't enough to counter act the buoyancy... the same way ducks float above water due to there oily feathers.
I do not believe this is true.Chavers said:I incorrectly stated above in an attempt to make the reply as short as possible. The point I was trying to make is any object less buoyant than geese will float higher in water when greese is applied. The grease increases the surface area of the ducks feathers while trapping air without decreasing it's buoyancy. The greased needle surface area is increased by the less buoyant grease that both contain air bubbles as well as traps air between the grease and needle. The grease doesn't make the needle float, but the needle is actually suspended inside the floating grease. The grease floats because the needle is increasing the grease's surface area without making it heavy enough to sink.
How are you suggesting the surface area of the grease decreases?Chavers said:sinking it will speed the process by decreasing the surface area of the grease,
Do you have any references at all to support any of this? It sounds completely made up.Chavers said:The grease doesn't have a strong enough bound to maintain its shape and volume under water. If the grease isn't evenly distributed it will tip to the heaviest side down. This will put the needle below the surface of the water which will increase grease removal so if the needle returns to water surface it will likely just sink again. Thought maybe cooling the water to just above freezing and the greased needle to the same tempurture to make the grease less malleable but thought that would give an incorrect result.
Grease, or any other substance with a lower density than water, creates a thin layer on the surface of the water. This layer creates surface tension, which allows the needle to float on top of the water instead of sinking.
Any type of grease with a lower density than water will work to create surface tension and allow the needle to float. However, some greases may dissolve or mix with the water, causing the needle to sink.
Yes, it is possible for a needle to sink if too much grease is applied. The key is to apply a thin layer of grease so that the surface tension is strong enough to support the needle's weight. If too much grease is applied, it may break the surface tension and cause the needle to sink.
Yes, other objects with a lower density than water can also float on water with the help of grease. This includes small pieces of paper, insects, and even some types of lightweight plastic.
The size of the object is not as important as its density. As long as the object has a lower density than water, it can float on water with the help of grease. However, the larger the object, the more grease will be needed to create enough surface tension for it to float.