Stephen Hawking's A Brief History of Time made an appearance in a Harry Potter movie. http://imgur.com/gallery/Nh6mQ
That is actually awesome. Glad I'm not the only one that thinks there should be scientific wizards, or magical scientists. I mean, closest thing to that I saw was in Fullmetal Alchemist, when someone was making a shockwave via alchemy, and Ed explained it as her condensing the air in front of her into a liquid or solid by rapidly cooling it, and then subliming/flash-steaming it immediately afterward, therefore creating a pressure wave equivalent to a grenade (paraphrased, of course; from the first anime, not Brotherhood).
Adopting some of those perspectives made me come up with some nasty ideas, ranging from stacking lightning runes, and wearing bracelets on an arm to serve as ammo for a magical railgiun (bracelets spinning/rotating for added aerodynamics), to using fire and earth magic to always have on me some grenades. Nothing like making glass frag grenades. Ice grenades are just as bad, if not worse, since if impaled, the ice will eventually melt, bleeding out the target.
EDIT:
Using FMA-alchemy or any sort of material manipulation magic, and advanced enough engineering talent, and a good enough memory of damn near everything, and you can build, and keep, a vehicle of your own making. Of course, the more modern the technology, the harder to build and maintain (or even complete one in functional order if you don't know how they're composed (try summoning a computer which is functional and can run anything (or pre-programmed with the contents you need)) by those means. ...Yeah, I'll stick with making primitive tools, though that still requires knowledge of said materials (plants, rocks, metals, etc. at an atomic level).