One pound of air at 100℉ is mixed with another pound of air at 40℉. the mixing process is constant pressure with constant specific heat. calculate: a. the final mixture temperature, ℉; ( 70℉ ) b. the change of entropy for the lb of gas originally at 100℉, btu/lb-°r; ( -0.01321 btu/lb°r ) c. the change of entropy for the lb of gas originally at 40℉, btu/lb-°r; ( +0.01398 btu/lb-°r ) d. the net change of entropy for the final mixture, ( +0.00077 btu/lb-°r )

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?

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.