One person raises a 100 lb. box 5 ft. to load on a truck. another person loads a similar box in half the time. which statements are correct? both men did equal work. the first person did more work. the second person did more work. the second person worked faster.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

What is the equation for electrical work?

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?