For the given state of stress, determine the normaland shearing stresses exerted on the oblique face of the shaded triangularelement shown. Use a method of analysis based on the equilibriumof that element, as was done in the derivations of Sec. 7.2
Allotropy- the characteristic of an element being able to exist in more than one crystal structure, depending on temperature and pressure. Amorphous material- a material that does not have long-range order for the arrangement of its atoms (e.g., silica glass). Anion- a negatively charged ion produced when an atom, usually of a non-metal, accepts one or more electrons. Atomic mass- the mass of the Avogadro constant of atoms, g/mol. Normally, this is the average number of protons and neutrons in the atom. Also called the atomic weight Atomic mass unit- the mass of an atom expressed as 1/12 the mass of a carbon atom with twelve nucleons. Atomic number- the number of protons in an atom Aufbau principle- a graphical device used to determine the order in
