Surface Tension: Force, Unit & Questions

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Surface tension is defined as the force at the interface between two fluids, measured in N/m, and it represents the force per unit length. It does not change with the length of the liquid container; rather, surface energy is affected by changes in surface area. The relationship between surface tension and surface area is crucial, as surface tension multiplied by the area gives the surface energy, which influences the formation of spherical bubbles and droplets. Understanding these concepts is essential for applications in fluid dynamics and material science. Overall, surface tension remains constant regardless of the container's dimensions.
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By definition, surface tesnsion is the force at the surface of separation of two fluids and it's unit is N/m. my doubts are
1. Is it the force per unit length?
2. Does Surface tenson changes with change in lenth of the liquid container?
 
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Yes. No. Surface energy changes with surface area; surface tension times the area of the surface bounding a phase = surface energy --- this is what drives the formation of spherical bubbles, droplets, etc.
 

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