Question

the surface tension of water is 72 dyne cm then express is it in si units

Answer 1

1 dyne = 10^−5 N

1 cm = 10^−2 m

∴72 dyne/cm

= 72×10^-5 N/10^-2 m

= 72×10^-3 N/m

= 0.072 N/m