There are some assumptions and statements related with the linearized wave equation. select all true statements. 1)the process (in which wave is transmitted through the fluid) is adiabatic. 2)the magnitude of acoustic pressure has to be higher than the ambient pressure. 3)the force related with viscosity is much smaller than other forces. 4)fluid has to be incompressible.

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