A cobalt matrix is reinforced with 35% tungsten carbide. A force of 175,000 N applied in the longitudinal direction of the composite results in strain of 1.25 x10-4. The elastic modulus for the composite is 350 GPa, the elastic modulus for the tungsten carbide is 685 GPa. Calculate the elastic modulus for the matrix.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature