allerySurface tension is defined as a force per unit:
ARadius
BLength
CVolume
DWeight
Answer & Solution
Correct answer: B. Length
1. The force acts along the line of the interface.
2. Dividing that force by the length of the line gives the quantity.
3. So surface tension is a force per unit length.
_Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._
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