Can the pilot of a supersonic aircraft hear the super boom? Explain.

The shockwave by a supersonic aircraft can be extremely dangerous. Explain why this is this case. What regulations exist for supersonic flights?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?