What units would you use to measure a virus (nanometers micrometers millimeters)

nanometers

to measure a virus you use nanometers

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

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.