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*Storage modulus: <math> E' = \frac {\sigma_0} {\varepsilon_0} \cos \delta </math>
*Loss modulus: <math> E'' = -\frac {\sigma_0} {\varepsilon_0} \sin \delta </math>
*Phase angle: <math> \delta = \arctan\frac {E''}{E'} </math>
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