Air is containted in a spring loaded piston cylinder device. The volume and pressue of the air at e initially 5m^3 and 300 kpa, respectively. Air i is expanded until its volume and pressure reach 4m^3 and 50 kPa, respectively.

a. Sketch this process on a P-V diagram.
b. Calculate the boundary work Wb

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

The temperature of air decreases as it is compressed by an adiabatic compressor. 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.