Use the information from the graph to answer the question
What is the acceleration of the object?
1 m/s2
Velocity vs. Time
Velocity (m/s)
45
40
35
30
25
20
5
0
0 2 4 6 8 10 12
Time (s)

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.