If solid-state physics had never been studied, which applications might be missing from science and technology today? Check all that apply. knowledge of the structure of DNA
an understanding of hemoglobin
ice
ground fault circuit interrupters
credit cards
quantum mechanics
aerogel

b) phosphorus pentoxide

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

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.