They are all on the chemistry people does jobs for.
The Chemists.
Car engine, those are oil or some kinda of washing liquid for the wind shield, meaning they are purely chemical.
Shampoo, that is Inorganic, still chemical types of reagent. They took over the dirts from the hair.
Food science, they use today's artificial dye, the coloring agent, and some are preservative, like a can of olives. If you are using them for pizza at home.
There are the science of liquids. Its just easier for me to comprehend, not that I choose chemistry more than the physical. People have some hobby, its what you incline to do. If you like that subjects, you become good at it. I just never even think, no one knows all these stuffs. Its in the school they teach you pages by pages.
We didn't have the internet Era that to say, you using the wiki. We had only the classroom, where the teacher has the book they reading to us.
