Assignment 1. Study the design of roof in the building where you live. What type of roofing design is your building?
2. State the types of roofing materials that is used in the building where you live.
3. Give a screen shot of the roof of your house.

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.