Technical drawing students and teachers were generally happy with the papers, but one question at higher level raised more than a few hackles. Pat O'Dwyer from Kenmare Vocational School, Co Kerry, ...

A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...

The group-14 elements silicon, germanium, tin and lead form anionic homometallic clusters that have been studied since the nineteenth century. They also form clusters with transition metals, in a ...