The United States generates and uses about 71 quads of energy each year, and its renewable sources generate about 40 GW. If the renewable sources are generating power about a third of the time, what fraction of its energy usage is based on renewable sources?

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

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.