Mencione tres materiales de uso comun en la aeronautica. De estos materiales, busque al menos tres de las siguientes propiedades:
• Modulo de elasticidad
• resistencia ultima a la tension
• resistencia a la corrosion
• dureza a la fractura
• peso
Determine cual de estos materiales seria mas apropiado para una parte de su seleccion dentro
de una aeronave y por que

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?