A plastic piece is floating at the interface of wáter (SG =1.00) and fluid A (SG unknown) as shown in figure. What is the specific gravity of fluid A if 45 % the plastic piece is immersed in water. Air temperature and pressures are 25 C and 1 atm. The specific gravity of plastic is = 0.87.

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