Tuesday, January 31, 2017

Techshore Inspection Services : CAPILLARY ACTION


Capillary action can be explained ,when a straw is immersed into a liquid which is of low viscosity taken in a glass, we can see the water rising in the tube compared to the level of water in glass. so its observed the water has climbed up in the straw than the level of water in the container. so this process seemed to have denied the gravity by moving up in the straw. hence this is called as capillary action- which states the movement of any liquid through or on the surface a material denying the gravity.
This property is observed in most of the liquids which seems to have low viscosity, water is always taken to be as an example for its unique property and water is the basis of the most of the liquids that we use in our daily life. some of the example for capillary action are, a paper towel is used to wipe off any wet surface, towel used to wipe up after a shower , a tired flower can be freshened up by spraying them on with fresh water.
The capillary property of any liquid depends upon two factors they are cohesion and adhesion. which seems they are pretty good for water. cohesion is the inter molecular force of attraction between the water molecules and adhesion is the force of attraction between two different particles, for example the force of attraction between water molecules and the walls of a straw is good. the adhesion force in case of water taken in a straw is so high than the cohesion force, so due to it the water molecules in the straw will be having lesser inter molecular attraction between themselves and hence water molecules tends to climb up on the walls of the straw surface, and the same case can be seen as more better in the case where the plastic straw is being replaced with a glass straw as the adhesion force of water is more compared to plastic .but when a glass of water taken the same effect can be seen but too low ,the reason is that in that case the cohesion force is greater than adhesion force hence the narrower the tube or the container in which the water is taken adhesion force outcomes the cohesion force.



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