El sistema es liberado desde el reposo en la configuración mostrada en la figura a t = 0. Determine el tiempo en el cual el bloque de masa m1 toca el extremo inferior del cuerpo
de masa m2. Además, determine la distancia recorrida por el cuerpo de masa m2. Use los
valores m1 = 0,5 kg, m1 = 2 kg, μS = 0,25, μK = 0,25 y d = 0,4 m.

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)