50m 50- Two cars of equal mass, A and B, are on
different floors of a parking garage as
shown. Car A moves in the basement au
10.0 m/s while car B remains at rest on the
second floor.

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.