Misc: How old was Mozart when he made his first tour as a performer?

Questions

In electric circuits, condition in a circuit in which the combined impedances of the capacity & induction to alternating currents cancel each other out or reinforce each other to produce a minimum or maximum impedance (electric circuit; electricity)?

In electricity, property of any object or substance to resist or oppose the flow of an electrical current?

In electricity, what is the opposite of an insulator?

In electronics, device used to propagate radio or electromagnetic waves or to capture radio waves?

In england, the speaker of the house is not allowed to do what?