Determine how to nondimensionalize the $$RLC$$ circuit equation so that the dimensionless equation takes the form

$$\displaystyle{\alpha \frac{d^2Q}{d\tau^2} + \frac{dQ}{d\tau} + Q = \cos{\beta \tau}}$$.

What are the definitions of $$\tau$$, $$Q$$, $$\alpha$$ and $$\beta$$?