A nozzle is designed to accelerate the fluid from V1 to V2 in a linear fashion. that is, V = ax + b, where a and b are constants. If the flow is constant with V1 = 10 m/s at x1 = 0 and V2 = 25 m/s at x2 = 1m, determine the local acceleration, the convenience accelration, and the acceleration of the fluid at points (1) and (2).

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.