Atmospheric air at a pressure of 1atm and a dry-bulb temperature of 32C has a wet-bulb temperature of 18C. Using the psychrometric chart, determine a) the relative humidity, b) the humidity ratio, c) enthalpy, d) dew-point temperature, and e) water vapor pressure. (ANSWER: 24.2%, 0.0072 kg/kg dry air, 50.6 kJ/kg dry air, 9.1C, 1.15 kPa)

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?

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.