Consider a fluid with mean inlet temperature ti flowing through a tube of diameter d and length l, at a mass flow rate . the tube is subjected to a surface heat flux that can be expressed as , where a and b are constants. determine an expression for the mean temperature of the fluid as a function of the x-coordinate.

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.