Air enters a convergence-divergence nozzle with 1.5 mpa pressure, 700 k temperature and very low velocity. there is a normal shock wave stands at the exit of the nozzle with mach 2.6. 3.a determine the pressure, temperature and density before and after the nsw 3.b quantify the entropy change across the nsw. 3.c determine the velocities before and after the nsw

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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?