Wow! i am doing the same project in my science class! (secondary two) this is what i found: in a hair dryer, there are two parts, that are pushed together, and then pushed through the spout of the hair dryer. the first part is the heater, wich is an element placed in the hair dryer made of electrical wires wich are nickel and chromium. They are very good heat generators! The second part of the hair dryer is the fan, wich pushes the hot air out of the spout.
That's all i found! hope i helped =)
Anonimous Rerson =O, October 2008