Formula Symbols - I

Mathematics Symbols

• See Algebra Symbols / Angle and Line Symbols / Basic Math Symbols / Bracket Symbols / Equivalence Symbols / Geometry Symbols / Greek Alphabet / Miscellaneous Symbols / Roman Numerals / Set Symbols / Square Root Symbols

 

Mathematics Terms

• See Algebra, Geometry, Trigonometry

 

Formula Symbols

• See A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

 

I

Symbol	Greek Symbol	Definition	US	Metric	Value
\(R\)	-	ideal gas constant	constant	constant	\(0.082\;06\;L\;atm\;mol^{-1}\;K^{-1}\)
\(lx\)	-	illuminance	-	\(lm\;/\;m^2\)	-
\(b\)	-	impact parameter	-	-	-
\(Z\)	-	impedance	-	-	-
\(Z_o\)	-	impedance of vacuum	constant	constant	\(376.730\;313\;461...\;kg\;m^2\;s^{-3}\;A^{-2}\)
\(d\), \(\;d_i\)	-	impeller diameter	\(in\)	\(mm\)	-
\(I\)	-	impulse	\(lbf-sec\)	\(N-s\)	-
\(I\)	-	incident energy	\(Btu \;/\; ft^2-hr\)	\(W \;/\; m^2\)	-
\(H\), \(\;L\)	-	inductance	-	\(Wb\;/\;A\)	-
\(n\)	-	index of refraction	-	-	-
\(X_L\)	-	inductive reactance	-	-	-
\(a_i\)	-	initial acceleration	\(ft\;/\;sec^2\)	\(m\;/\;s^2\)	-
\(I_a\)	-	initial abstraction	\(in\)	\(mm\)	-
\(\omega_i\)	omega	initial angular velocity	\(ft\;/\;sec\)	\(m\;/\;s\)	-
\(l_i\)	-	initial length	\(in \;or\; ft\)	\(mm \;or\; m\)	-
\(x_i\)	-	initial position	-	-	-
\(T_i\)	-	initial temperature	\(^\circ F\)	\(C\)	-
\(t_i\)	-	initial time	\(sec\)	\(s\)	-
\(v_i\)	-	initial velocity	\(ft\;/\;sec\)	\(m\;/\;s\)	-
\(V_i\)	-	initial volume	\(in^3 \;or\; ft^3\)	\(mm^3 \;or\; m^3\)	-
\(p_i\)	-	inlet pressure	\(lb\;/\;ft^2 \;or\; psi\)	\(Pa\)	-
\(E_i\)	-	input energy	\(ft\;-\;lbf\)	\(J\)	-
\(W_i\)	-	input work	\(ft\;-\;lbf\)	\(J\)	-
\(ID\)	-	inside diameter	\(in\)	\(mm\)	-
\(ID\)	-	inside diameter of pipe	\(in\)	\(mm\)	-
\(D_b\)	-	inside diameter of valve body outlet	\(in\)	\(mm\)	-
\(D_p\)	-	inside diameter of outlet pipe	\(in\)	\(mm\)	-
\(a_i\)	-	instantaneous acceleration	\(ft\;/\;sec^2\)	\(m\;/\;s^2\)	-
\(\alpha_i\)	alpha	instantaneous angular acceleration	\(lbf\;/\;ft^2-sec\)	\(Pa-s\)	-
\(v_i\)	-	instantaneous velocity	-	-	-
\(n_i\)	-	instrinsic number density	-	-	-
\(I\)	-	interference	-	-	-
\(a\)	-	interference factor	-	-	-
\(alpha\)	alpha	internal conversion coefficient	-	-	-
\(P\)	-	internal design pressure	\(lb\;/\;ft^2 \;or\; psi\)	\(Pa\)	-
\(U\)	-	internal energy	\(ft-lbf\)	\(J\)	-
\(e\)	-	internal roughness	-	-	-
\(d\)	-	internal pipe diameter	\(in\)	\(mm\)	-
\(G_0^{-1}\)	-	inverse conductance quantum	constant	constant	\(1.290\;640\;372\;17\;x\;10^4\;kg\;m^2\;s^{-3}\;A^{-2}\)
\(\alpha^{-1}\)	alpha	inverse fine structure constant	dimensionless constant	dimensionless constant	\(137.035\;999\;084\)
\(w_{ci}\)	-	ion cyclotron circular frequency	-	-	-
\(T_i\)	-	ion temperature	-	-	-
\(Ir\), \(\;\xi\)	xi	Iribarren number	dimensionless	dimensionless	-
\(\alpha\)	alpha	isentropic compressibility	\(1\;/\; R\)	\(1\;/\;K\)	-
\(k\)	-	isentropic exponent	-	-	-
\(\beta\)	beta	isobaric compressibility	\(1\;/\; R\)	\(1\;/\;K\)	-
\(\kappa\)	kappa	isothermal compressibility	\(1\;/\; R\)	\(1\;/\;K\)	-
Symbol	Greek Symbol	Definition	US	Metric	Value