Prototypes do all of the following except A)allow for experimentation with new ideas.
B) provide a way to test improvements and fix flaws.
C) create a physical model in the early design stages
D) remain unchanged throughout the design process

A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.

What is a monomer? how do they form a ploymer from the view point of chemical bonding?

What is creep? what is stress relaxation?