TA Instruments AR 2000, Operator'S Manual

Page: 125 / 144

AR 2000 Operator's Manual
125
Appendix B
Symbols and Units
The following symbols are used throughout. The instrument can be used with either cgs or SI units depending
upon the preference.
Parameter Symbol CGS Unit SI Unit Conversion
CGS to SI
Angular
ω
rad rad No change
Displacement
Angular
ϖ
rad s -1 rad s -1 No change
Velocity
Compliance
J cm 2 dynes -1 m 2 N -1 x 10
Cone Angle
α
degrees degrees No change
Elastic Shear dyne cm
−2
rad
−1
N m -2 rad -1 x 10 -1
Modulus
Shear Rate g s -1 s- 1 No change
Shear Strain
γ
No change
Shear Stress
σ
dyne cm
-2
N m
-2
(Pa) x 10
-1
Torsional Force
τ
dyne cm N m x 10 -7
Viscosity
η
Poise (P) Pa.s 1 cP = 1 mPa.s
Measurement CGS Unit Symbol SI Unit Symbol Conversion
from CGS
to SI
Area
square cm 2 square m 2 10 4 cm 2 = 1m 2
centimeters meters
Force dyne dyne Newton N 10 5 dyne = 1N
Length
centimeters cm meter m 10 2 cm = 1m
Mass gram g kilogram kg 1000g = 1kg
Plane Angle Radian rad Radian rad No change
(360°=2
π
rad)
Temperature degree °C Celsius °C No change
Celsius
(Centigrade)
Time second s second s No change
Volume cubic cm 3 cubic m 3 10 6 cm 3 = 1m 3