Determine the mean effective pressure of an ideal otto cycle that uses air as the working fluid if its state at the beginning of the compression is 13 psia and 60°f, its temperature at the end of the combustion is 1500°f, and its compression ratio is 9. use constant specific heats at room temperature. the properties of air at room temperature are r- 0.3704 psia-ft3 lbm-r, cp 0.240 btu/lbm-r, cv- 0171 btu/lbm-r, and k 1.4 the mean effective pressure .

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.