Cite the phases that are present and the phase compositions for the following alloys: (a) 90 wt% zn—lo wt% cu at 400°c (750°f)(b) 75 wt% sn-25 wt% pb at 175°c (345°f)(c) 55 wt% ag-45 wt% cu at 900°c (1650°f)(d) 30 wt% pb-70 wt% mg at 425°c (795°f)(e) 2.12 kg zn and 1.88 kg cu at 500°c (930°f)(f) 37 lbm pb and 6.5 lbm mg at 400°c (750°f)(9) 8.2 mol ni and 4.3 mol cu at 1250°c (2280°f)(h) 4.5 mol sn and 0.45 mol pb at 200°c (390°f)

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

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?

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.