Aspark ignition engine is to be modeled using fluid, air, is at 95 kpa and 290 k before compression. the compression ratio is 9 and the maximum temperature is 2000 k. for the calculations below use variable specific heats an ideal otto cycle. the working a) find the pressure and temperature at the end of compression (kpa, k) b) find the required heat input into the cycle on a specific basis (kj/kg) c) find the net specific work from the cycle (kj/kg) d) find the cycle thermal efficiency.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?