was just curious to know what a cigarette lighter made of what metal they use in the exterior where the light comes out.what kind of plastic is used to hold the liquid?will the metal melt off if its switched on for a while? what's the difference between a $1 lighter and the $24 zippo lighter ...
I don't know where to start and where and i do not understand the problem could you help me out please
In solving for the temperature distribution resulting from two spheres separated by distance and heated to maintain their temperatures equal to unity one derives the following set of...