First slide

Surface tension

Question

Unit of surface tension is:

Easy

A

newton/m²
B

electron volt/cm²
C

joule/m
D

joule x mm

Solution

surface tension = $\frac{F O R C E}{L E N G T H} = \frac{N}{m} N m^{- 1}$
= $\frac{w o r k}{a r e a}$

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