1. Determine the force in each of the members located to the left of FG for the scissors roof truss shown. State whether each member is in tension (T) or compression (C). Ans: AB = 9.90 kN C; AC = CE = 7.83 kN T; BC = 0; BD = 7.07 kN C; BE = 2.00 kN C; DE = 1.00 kN T; DF = 5.03 1 kN 2 kN 2 kN 1m 1 kN Bo 1 m kN C; DG = 0.56 kN C; EG = 5.59 kN T; 1m 1 m 2 m' 2m 2m | 2 m | 2 m ' 2m

In this problem you will model the mixing energy of a mixture in a relatively simple way, in order to relate the existence of a solubility gap to molecular behavior. Consider a mixture of A and B molecules that is ideal in every way but one: The potential energy due to the interaction of neighboring molecules depends upon whether the molecules are like or unlike. Let n be the average number of nearest neighbors of any given molecule (perhaps 6 or 8 or 10). Let  μ0be the average potential energy associated with the interaction between neighboring molecules that are the same (A-A or B-B), and let  μAB be the potential energy associated with the interaction of a neighboring unlike pair (A-B). There are no interactions beyond the range of the nearest neighbors; the values of  μ0 and  μAB are independent of the amounts of A and B; and the entropy of mixing is the same as for an ideal solution. (a) Show that when the system is unmixed, the total potential energy due to all the…

show me a solution

Finds the theoretical density of a solid that crystallizes into a face-centered cubic unit cell, where a = 3.48 Å and its molecular weight 40 g / mol

What is mole?

Note: Please provide a simple and step-by-step solution.

find the unit for K