Terminology tables

In the Radioactive decay tutorial there is a table listing the dependent variable, independent variable, differential and parameter(s). Complete a similar table for the following physical systems:

physical notation	generic notation
	dependent variable(s)
	independent variable(s)
	differential(s)
	parameter(s)/constants(s)

a) The amount of charge that flows every second from a capacitor,

\begin{equation} \frac{\mathrm{d} Q}{\mathrm{d} t} = -\beta Q \end{equation}

b) The motion of a non-linear pendulum driven by a force oscillating at frequency $\sigma$,

\begin{equation} \frac{\mathrm{d}^2\theta}{\mathrm{t}^2} = -\frac{g}{l}\sin(\theta) + C\cos(\theta)\sin(\sigma t). \end{equation}

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physical notation	generic notation
$Q$	dependent variable(s)
$t$	independent variable(s)
$\frac{\mathrm{d}Q}{\mathrm{d}t}$	differential(s)
$\beta$	parameter(s)/constant(s)

physical notation	generic notation
$\theta$	dependent variable(s)
$t$	independent variable(s)
$\frac{\mathrm{d}^2\theta}{\mathrm{d} t^2}$	differential(s)
$l$, $C$, $\sigma$, $g$	parameter(s)/constant(s)