An unsaturated solution occurs when the solute has not reached the point of saturation, meaning more solute can still dissolve in the solvent. This is the state before reaching a saturated solution.
In the system shown below, $x(t)=\sin(t)u(t)$. In steady-state, the response $y(t)$ will be 
The time constant of the network shown in the figure is 
The parallel RLC circuit shown in the figure is in resonance. In this circuit, 