Question

derive formula for surface tension

Answer 1

Answer: Surface tension is the property of a free liquid surface. Surface tension is due to cohesive forces between liquid molecules
 
Surface tension is the molecular phenomena of liquids. Surface tension does not obey Hoook’s law.
 
 Due to surface tension, liquid surfaces will tend to acquire minimum of surface area. Due to surface tension, a liquid surface will behave like stretched membrane.
 
Surface tension is the tangential force acting at right angles on an imaginary line of unit length drawn over a surface of the liquid.
 
Surface Tension = Force / Length
 
From the above formula we can write the dimensional formula of the surface tenson as the following;
 
ML-2
 
Units:  newton / meter