Aresearcher wishes to produce a 1.5-t magnetic field at two separate locations: (i) at the center of a 10-turn circular loop of diameter 25 cm, and (ii) at a perpendicular distance of 1.0 cm from a long straight wire. what current would be required in each case?

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?