Problem 3-1.(5pts) Apiston-cylinder device contains 2 ft3of airinitially at 200 lbf/in2and 450oF. A linear spring which has a spring constant of 10 kN/m is attached to the 1-ft diameter piston and it is initially undeformed. This device is now cooled until the volume is one-half its original size. Calculate (a) the total exergy destroyed, and (b) the second law efficiency.

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).