Question

the surface tension of water is 72dyne cm-1 express it in SI unit .

Answer 1

Answer:

0.072 N//m

Solution :

Surface tension, σ=FI=[M1L0T−2]

Here, n1=72,M1=1g,T1=1s

n2=?,M2=1kg,T2=1s

n2=n1(M1M2)1(T1T2)−2=72(1g1kg)1(1s1s)−2

=72×10−3=0.072N/,