Find phase diagrams from cu-ni, cu-zn, cu-sn alloys and the water-salt system. for each alloy/system, indicate phases present over a range of temperatures and composition. a. are these phases solid solutions, precipitates or liquid solutions? b. if solid solutions, are they interstitial or substitutional solid solutions? c. if precipitates, are they intermetallic particles or ceramic particles? d. what crystal lattice do the solid phases have? e. is the melting temperature of water-salt a function of salt content? f. if yes, how does the melting temperature change with composition? does it make sense to use salt to melt snow? g. for each alloy, indicate the composition for minimum melting temperature

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.