The diagrams show the activity of molecules within a small, solid clay sphere. Based on the changes in the particles and the sphere itself, what can you conclude is happening to the sphere?
OA It is being gradually chilled, then rapidly heated.
OB It is being gradually heated, then rapidly cooled.
OC It is being rapidly chilled, then gradually warmed.
OD
It is being rapidly heated, then gradually cooled.

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)