Question

What is the application of surface tension in our daily life

Answer 1

Applications of Surface Tension...

1) Walking of insects on water... Small insects can easily walk on water because their weight is not enough to penetrate the surface of liquid or water....

2) Rounding of bubbles... The surface tension of water provides the necessary wall tension for the formation of bubbles with respect to water...

3) Floating of needle in water... Though needle is many times as dense as water. A small needle can be float on the surface of water if carefully placed on water..

Answer 2

Answer:

Applications of surface tension in oor daily life:

1. Walking on water: Small insects such as the water strider can walk on water because their weight is not enough to penetrate the surface.
2. Floating a needle: A carefully placed small needle can be made to float on the surface of water even though it is several times as dense as water. If the surface is agitated to break up the surface tension, then needle will quickly sink.
3. Don't touch the tent!: Common tent materials are somewhat rainproof in that the surface tension of water will bridge the pores in the finely woven material. But if you touch the tent material with your finger, you break the surface tension and the rain will drip through.
4. Clinical test for jaundice: Normal urine has a surface tension of about 66 dynes/centimeter but if bile is present (a test for jaundice), it drops to about 55. In the Hay test, powdered sulfur is sprinkled on the urine surface. It will float on normal urine, but will sink if the surface tension is lowered by the bile.
5. Surface tension disinfectants: Disinfectants are usually solutions of low surface tension. This allow them to spread out on the cell walls of bacteria and disrupt them.
6. Soaps and detergents: These help the cleaning of clothes by lowering the surface tension of the water so that it more readily soaks into pores and soiled areas.
7. Washing with cold water: The major reason for using hot water for washing is that its surface tension is lower and it is a better wetting agent. But if the detergent lowers the surface tension, the heating may be unnecessary.
8. Why bubbles are round: The surface tension of water provides the necessary wall tension for the formation of bubbles with water. The tendency to minimize that wall tension pulls the bubbles into spherical shapes.
9. Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets. Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer.

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