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)

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

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