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Subject:
Not slippery when wet
Category: Science Asked by: apteryx-ga List Price: $4.88 |
Posted:
07 Jun 2003 22:03 PDT
Expires: 09 Jun 2003 22:13 PDT Question ID: 214581 |
Water makes a lot of things slippery: the road, rocks in the river, small, wriggling children . . . so why don't wet clothes just slide right off us? Even a little bit of moisture makes clothing stick to our bodies, and not just fabrics like socks or sweaters that get heavy and soggy and would cling to anything. If I'm still a little damp from a shower, it's hard to put on dry underwear. And putting a wet bathing suit back on? Major challenge. How come? I want to know exactly what is going on and not just a loose answer like "surface tension." Thank you, Apteryx |
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There is no answer at this time. |
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Subject:
Re: Not slippery when wet
From: a1s2d3f4-ga on 08 Jun 2003 14:03 PDT |
Water is made of the elements hydrogen and oxygen, when the two are bonded together they make a polar covalent bond (a bond where the electrons are closer to one side of the compound than the other, so one side has a slightly positive charge while the other is slightly negative). This is because oxygen has a higher Electronegativity (3.5) so oxygen is slightly negative. Electronegativity is the measurement of an elements hold on its electrons. Because water is non-polar covalent it has a positive and negative side. so thus it forms weak hydrogen bonds with sediments on roads and allowing them to have the same fluidity as water. because of this they have very little surface tension and the tires of a car will slide. but that is not so for things such as clothes. clothes form these bonds with your skin, and as a result its hard to pull wet clothes off |
Subject:
Re: Not slippery when wet
From: apteryx-ga on 08 Jun 2003 14:41 PDT |
Hi, a1s2d3f4, and thanks for your free answer. That sounds very knowledgeable and confident, and it might be answer enough if I fully understood it. I know that water is H2O (subscripted 2), and I remember valences and bonds and so on from high school chemistry, so I can interpret that part all right. But your explanation is unclear to me in at least one respect: >when the two are bonded together they make a polar covalent bond >Because water is non-polar covalent Aren't those two statements contradictory? Also, I am not sure that you're telling me why clothes stick when you say that they form the kind of bond that sticks. It just moves the question over one notch: why do they form the kind of bond that sticks? But I mustn't ask too much of you since you are responding as a commenter and not as a researcher. So I'm still open to an answer that goes all the way. Thank you, Apteryx |
Subject:
Re: Not slippery when wet
From: a1s2d3f4-ga on 08 Jun 2003 16:32 PDT |
water is polar-covalent. If you can remember from high school chemistry, if the difference between the Electronegativitys of the two elements involoved is higher than .3 and lower than 1.7 then it is polar covalent. this is based off of the site electronegativity for O=3.5, H=2.1 (E1-E2= bond dispersion) 3.5-2.1=1.4 http://old.jccc.net/~pdecell/chemistry/bonds.html we are made up of many polar molecules, (such as water), when two polar molecules meet, the negetives are attracted to the positive while the positives are attracted to the negetive sides. this process works just like a magnet does, the opposites are attracted to eachother. so the water forms bonds with your skin. look at the sight I gave you, it explains the atributes of a polat molecule better then I have. |
Subject:
Re: Not slippery when wet
From: apteryx-ga on 09 Jun 2003 22:13 PDT |
Thanks for your trouble. |
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