The inlet ducting to a jet engine forms a diffuser that steadily decelerates the entering air to zero velocity relative to the engine before the air enters the compressor. Consider a jet airplane flying at 1000 km/h where the local atmospheric pressure is 0.6 bar and the air termperature is 8 degrees Celcius. Assuming ideal gas behavior and neglecting heat transfer and potential enregy effects, determine the temperature, in degrees Celsius, of the air entering the compressor.