Vinyl Asylum

All units are equal

124.168.29.241

In Reply to: RE: Grado doesn't specify posted by hesson11 on June 26, 2009 at 04:59:20

CU = Compliance Unit. In the old "CGS" system the unit was 10^-6 cm/dyne. In the modern SI system the unit is um/mN. All the units are the same:

1 cm / dyne = 1 g ^-1.s^2 = 10^3 kg^-1.s^2

thus 10^-6 cm / dyne = 10^-3 kg^-1.s^2

1 um = 10^-6m

1 mN= 10^-3 kg.m.s^-2

therefore 1 um / mN = 10^-3 kg^-1.s^2

the two units are thus identical
Mark Kelly

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