Surface Tension

Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. It is revealed, for example, in the floating of some objects on the surface of water, even though they are denser than water, and in the ability of some insects (e.g. water striders) to run on the water surface. This property is caused by cohesion of similar molecules, and is responsible for many of the behaviors of liquids.

Surface tension has the dimension of force per unit length, or of energy per unit area. The two are equivalent—but when referring to energy per unit of area, people use the term surface energy—which is a more general term in the sense that it applies also to solids and not just liquids.

In materials science, surface tension is used for either surface stress or surface free energy.

Read more about Surface TensionCauses, Methods of Measurement, Thermodynamics, Data Table

Other articles related to "surface tension, surface":

Surface Tension - Data Table
... Surface tension of various liquids in dyn/cm against air Mixture compositions denoted "%" are by mass dyn/cm is equivalent to the SI units of mN/m (millinewton per meter) Liquid ...
Laplace Pressure
... between the inside and the outside of a curved surface ... The pressure difference is caused by the surface tension of the interface between liquid and gas ... where and are the radii of curvature and is the surface tension ...
Microdispensing - Jet-forming Dispensing
... enough that the effects of gravitation and surface tension on the separation of the fluid from the nozzle are of secondary importance ... v Jet velocity D Nozzle diameter ρ Fluid density σ Surface tension The physical border line between drop- and jet-forming is around a Weber-number of 8 ... At this point the dynamic pressure of the flowing medium exceeds the pressure from the surface tension of the drop, which therefore sticks to the nozzle ...
Stalagmometric Method - Modified Method
... of the drops each time, thus reduce the precision of value of the surface tension ... The modified method to determine the surface tension based on the weight of the drops in a fixed number can be more precise than the original method based on the number of drops, especially for the fluid which ... is that it actually get more precise value of the surface tension and reduce the duration of experiments ...
Capillary Condensation - Kelvin Equation
... mean curvature of meniscus = liquid/vapor surface tension = liquid molar volume = ideal gas constant = temperature This equation, shown above, governs all equilibrium ... This pressure drop is due solely to the liquid/vapor surface tension and curvature of the meniscus, as described in the Young-Laplace equation In the Kelvin equation, the saturation vapor pressure ...

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