2006-09-21 22:24:24 · 9 answers · asked by freak 1 in Science & Mathematics ➔ Chemistry
Because liquid getting absorbed by the object on which liquid falls.
If the object does not absorb the liquid, it will not get wet.
2006-09-21 22:26:30 · answer #1 · answered by Govinda 4 · 0⤊ 0⤋
An object getting wet depends upon the nature of the material and the surface tension of the liquid that it is subjected to.
It's because of a thingy called angle of contact... i.e: The angle made by the surface and the tangent drawn from the surface of the liquid to the point of contact!
This angle of contact which i'm talking about is the relative strenghts of the cohesive( force of attraction between two molecules of the same substance) and adhesive force( force of attraction between two molecules of different substances.)
For a liquid and a surface,
if angle of contact (say A) is:
0< A < 90, it partially wets the surface
0< A < 180 there is no wetting
And if A = 0, there is 100% wetting.. (in case pure watter and clean glass.
Now, if you drop a liquid with high surface tesion (say mercury) on a glass plate... what you see is that it forms a water droplet and that if you tilt the glass plate, it slides off without wetting the surface. This is because.. the 'angle of contact' between the mercury and the glass plate is > than 90 degrees (140 really) which means that there will be no wetting.
However, if water falls on a glass plate, the angle of contact is 0 and if you try out with tap water, it's appx 18 degrees.. so it wets the surface of the glass...
I hope i have answered your Q...
2006-09-22 11:22:40 · answer #2 · answered by Ajay I 1 · 0⤊ 0⤋
I am familiar with what is, I think properly, called wetting agent, which is added to water - to the final washing after developing and fixing - to make it wet with respect to the surfaces of photographic film. Without this agent the water resides on film in blobs, resulting in drying marks; with it, most of the water drains off and the rest dries evenly. So in response to the query I would say (a) water isn't always wet; wetness is always relative to a given substance and/or type of surface and (b) as to why it is wet when it is, presumably the answer is in terms of surface tension.
2006-09-22 05:36:58 · answer #3 · answered by Harry thePotter 4 · 0⤊ 0⤋
Because water is a liquid and it can spread through capillaries. If the subsrtate on which it falls is porous then the water goes inside it and make them wet. Also the substrate has some hydrophillic character. If hydrophobic then it will not wet it like plastic fibers, polythene, oils, greese etc.
2006-09-22 05:36:54 · answer #4 · answered by dinu 3 · 0⤊ 0⤋
well... this is the property of water that is fludity the molecules of a liquid are moderately close to each other and the inter molecular force of attriction is not strong enoughf to keep the molecules within the bulk so liquids spills on a plain surface and when a liquid spills on a surface like a cloth the molecules enters in the pores of the fabric and we feel it wet
2006-09-23 01:51:29 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Liquids seep through the pores in an object which though invisible to the naked-eye do exist.
2006-09-22 07:47:09 · answer #6 · answered by Akshay p 2 · 0⤊ 0⤋
because water is wet-think about it
2006-09-22 05:26:44 · answer #7 · answered by JILL NUDE TELEMARKETER 1 · 1⤊ 0⤋
Try alcohol out!
2006-09-22 05:37:01 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Because they are all sick perverts!
And I am not gonna take it anymore!
2006-09-22 05:25:54 · answer #9 · answered by volksbank 4 · 0⤊ 0⤋