Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40oC and a volume of 0.2 m3, is stirred until its temperature is 353oC. Assuming the ideal gas model with γ=1.4 for the air. Ignore kinetic and potential energy. Determine: (a) (10%) the final pressure, in bar; (b) (15%) the work, in kJ; (c) (15%) the amount of entropy produced, in kJ/K.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

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?

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid