A piston-cylinder device contains 1 m3 of air at 100 kPa, and 300 K. The air is now compressed to one tenth of the original volume in an adiabatic and frictionless manner. Using the PG model, determine the boundary work transfer during the process.

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?