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Direct Energy, 2018a

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342 Appendices<br />

Symbol Quantity Units Scalar? Comments<br />

c n Coecient unitless S For integer n<br />

C Capacitance F S<br />

C v<br />

d<br />

Specic heat<br />

Piezoelectric strain<br />

constant<br />

d thick Thickness m S<br />

J<br />

S<br />

kg·K<br />

m<br />

S May be a<br />

V<br />

scalar or<br />

matrix<br />

D <strong>Direct</strong>ivity unitless S For antennas<br />

−→ D Displacement ux<br />

C<br />

m V<br />

2<br />

density<br />

e e unitless C ≈2.718<br />

e − Electron Usedin chem.<br />

reactions<br />

E <strong>Energy</strong> J S<br />

−→ E Electric eld<br />

V<br />

m V<br />

intensity<br />

E f Fermi energy level J S Also called<br />

chemical<br />

potential<br />

E g <strong>Energy</strong> gap J S Also called<br />

bandgap<br />

f Frequency Hz S<br />

−→ F Force N V<br />

g n<br />

Degeneracy of<br />

energy level n<br />

unitless<br />

S<br />

G<br />

Component of an<br />

invariant<br />

J<br />

S

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