Can the vapour from perfume explode?
It depends on the ingredients, but most are at least quite flammable, while several are indeed, combustible. Most chemicals are flammable, and perfume is all about the man-made chemicals.
A perfume case is ten dollars The perfume costs nine dollars more than the perfume bottle What is the price of the perfume and the perfume bottle seperatly?
The concentration of the oils. Eau de Toilette is far less perfume concentrates than perfume. Perfume can have 15-40% perfume concentrates while Eau de toilette has only 1-6% perfume concentrates. The scent is therefor a lot lighter and doesn't last as long in the Eau de toilette than in the perfume.
Was the time science money worth it for perfume or would it be better off invested in medical research why?
The two aren't comparable; governments generally don't fund advanced projects in perfume research, and there's no telethon for Parfum Chanel. Perfume "research" (such as it is) is funded by perfume revenues. In short: perfume and medical research do not compete to any significant degree. It's not like any executives at Liz Claiborne are sitting there thinking "Perfume ... cancer research ... perfume ... cancer research ... oh, heck, perfume it is then." Perfume is what…