The si unit of surface tension is

Surface tension is the tendency of fluid surfaces to shrink into the minimum surface area possible.

Where F is the force per unit length L is the length in which force act and T is the surface tension of the liquid. Get Started. SSC Exams. Banking Exams. Teaching Exams. Civil Services Exam.

The si unit of surface tension is

Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects e. At liquid—air interfaces, surface tension results from the greater attraction of liquid molecules to each other due to cohesion than to the molecules in the air due to adhesion. There are two primary mechanisms in play. One is an inward force on the surface molecules causing the liquid to contract. The net effect is the liquid behaves as if its surface were covered with a stretched elastic membrane. But this analogy must not be taken too far as the tension in an elastic membrane is dependent on the amount of deformation of the membrane while surface tension is an inherent property of the liquid — air or liquid — vapour interface. Because of the relatively high attraction of water molecules to each other through a web of hydrogen bonds , water has a higher surface tension Surface tension is an important factor in the phenomenon of capillarity. Surface tension has the dimension of force per unit length , or of energy per unit area. In materials science , surface tension is used for either surface stress or surface energy.

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Surface tension is the property of any fluid which attempts to minimize its free surface area. The surface tension of a liquid is measured as the force per length acting on an imaginary line drawn tangentially on the liquid's free surface. The quantity is scalar. Surface tension is a molecular phenomenon that is electrical in nature due to cohesive force, and the root cause of force. The surface tension of a liquid depends only on the nature of the liquid and is independent of the film surface or line length. Small drops in the liquid are spherical due to the surface tension properties. The force of attraction that acts between the molecules of different substances is called adhesive force, e. The force of attraction acting between the same substance molecules is called a unified force. For example, the force of attraction between water molecules, glass molecules, etc. Surface tension is a tendency of the liquid surfaces to shrink to the minimum possible surface area.

The si unit of surface tension is

Surface tension is a phenomenon that occurs due to the cohesive forces of liquid molecules. The molecules on the surface of a liquid are attracted by their neighbors from the sides and bottom. Intermolecular forces like hydrogen bonding and Van der Waals forces hold the molecules together. Within the body of a liquid, molecules do not experience any force because the interactive forces from the neighboring molecules cancel out. On the surface, the molecules are attracted from the sides and bottom.

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HAL Management Trainee. BEL Probationary Engineer. Surface tension gives them their near-spherical shape, because a sphere has the smallest possible surface area to volume ratio. Solid mechanics. That is to say that when a liquid is forming small droplets, the equilibrium concentration of its vapor in its surroundings is greater. Agnes Pockels discovered the influence of impurities on the surface tension. IB Junior Intelligence Officer. Kerala Police Constable. Have you noticed when you fill a glass up to the brim with water, you can still add a few more drops till it spills out? WB TET. NVS Group C. ESIC Stenographer. Laws Conservations Mass Momentum Energy. The talk page may contain suggestions. When a soap bubble is charged, it expands.

If a small quantity of liquid is in equilibrium with its vapor, it will spontaneously assume a spherical form. This is also true for drops suspended in a liquid with which they are immiscible.

Goa Police Constable. For a solid, stretching the surface, even elastically, results in a fundamentally changed surface. FCI Assistant Grade 3. What is the surface tension of water at its boiling point? Check other units in the table provided below. Or have you ever broken a thermometer and observed how the fallen mercury behaves? Gujarat High Court Peon. FCI JE. Table of Contents: What is Surface Tension? Formation of drops occurs when a mass of liquid is stretched.