Cite the phases that are present and the phase compositions for the following alloys: (a) 15 wt% sn—85 wt% pb at 100°c [212°f)(b) 25 wt% pb—75 wt% mg at 425°c (800°f)(c) 85 m96 ag—15 wt% cu at 800°c (1470°f)(d) 55 wt% zn—45 wt% cu at 600°c (1110°f](e) 1.25 kg sn and 14 kg pb at 200°c (390°f)(f) 7.6 lbm cu and 144.4 lbm zn at 600°c (1110°f](g) 21.7 mol mg and 35.4 mol pb at 350°c [660°f](h) 4.2 mol cu and 1.1 mol ag at 900°c (1650°f)

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.