The − i relationship for an electromagnetic system is given by = 1.2i1/2 g where g is the air-gap length. For current i = 2 A and g = 10 cm, determine the mechanical force on the moving part

(a) Using the energy of the system
(b) Using the coenergy of the system

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.