According to the text, a star must be hotter than about 25,000 k to produce an h ii region. both the hottest white dwarfs and main-sequence o stars have temperatures hotter than 25,000 k. which type of star can ionize more hydrogen? why?

Ascientist is working with a new kind of quantum dot to make a dye. he is applying newton’s laws to the particle, but it seems to be breaking these laws of physics. which action will most likely the scientist study the particle’s motion? a. he needs to remember that the particle is too large for quantum analysis. b. he must continue to use newtonian mechanics, but he needs to learn more about the particle. c. he needs to use quantum mechanics, not newtonian mechanics, because this is a nanotechnology product. d. he must determine new physical laws that only apply to quantum dots.