Formula Symbols - I

For other 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

Symbol	Greek Symbol	Definition	US	Metric
\( R\)	-	ideal gas constant	-	\(JK^{-1} mol^{-1}\)
\(lx\)	-	illuminance	-	\(lm\;/\;m^2\)
\(b\)	-	impact parameter	-	-
\(Z\)	-	impedance	-	-
\(I\)	-	impulse	\(lbf-sec\)	\(N-s\)
\(I\)	-	incident energy	\(Btu \;/\; ft^2-hr\)	\(W \;/\; m^2\)
\(H \;or\; L\)	-	inductance	-	\(Wb\;/\;A\)
\(n\)	-	index of refraction	-	-
\(X_L\)	-	inductive reactance	-	-
\(a_i\)	-	initial acceleration	\(ft\;/\;sec^2\)	\(m\;/\;s^2\)
\(\omega_i\)	omega	initial angular velocity	\(ft\;/\;sec\)	\(m\;/\;s\)
\(l_i\)	-	initial length	-	-
\(x_i\)	-	initial position	-	-
\(T_i\)	-	initial temperature	-	-
\(t_i\)	-	initial time	\(sec\)	\(s\)
\(v_i\)	-	initial velocity	\(ft\;/\;sec\)	\(m\;/\;s\)
\(V_i\)	-	initial volume	-	-
\(p_i\)	-	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	\(in\)	\(mm\)
\(D_b\)	-	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	-	-
\(U\)	-	internal energy	\(ft-lbf\)	\(J\)
\(e\)	-	internal roughness	-	-
\(d\)	-	internal pipe diameter	\(in\)	\(mm\)
\(w_{ci}\)	-	ion cyclotron circular frequency	-	-
\(T_i\)	-	ion temperature	-	-
\(\alpha\)	alpha	isentropic compressibility	\(1\;/\; R\)	\(1\;/\;K\)
\(k\)	-	isentropic exponent	-	-
\(\beta\)	beta	isobaric compressibility	\(1\;/\; R\)	\(1\;/\;K\)
\(\kappa\)	kappa	isothermal compressibility	\(1\;/\; R\)	\(1\;/\;K\)