how many cm in 1 dyne?
1 dyn = 1 g·cm/s2 = 10−5 kg·m/s2 = 10−5 N. The dyne per centimeter is the unit traditionally used to measure surface tension. For example, the surface tension of distilled water is 72 dyn/cm at 25 °C (77 °F); in SI units this is 72×10−3 N/m or 72 mN/m.