Prepare a report (written or oral) on the contributions of an aviation pioneer. Research this individual’s life and work, specifically looking for examples of how he or she applied an understanding of science to aviation.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.