Refrigerant 22 in a refrigeration system enters one side of a counterflow heat exchanger at 12 bar, 28 c. the refrigerant exits at 12 bar, 20 c. a separate stream of r-22 enters the other side of the heat exchanger as saturated vapor at 2 bar and exits as superheated vapor at 2 bar. the mass flow rates of the two streams are equal. stray heat transfer from the heat exchanger to its surroundings and kinetic and potential energy effects are negligible. determine the entropy production in the heat exchanger, in kj/k per kg of refrigerant flowing. what gives rise to the entropy production in this application?

What is the main role of ctsos at the local level? at the local level, the main role of ctsos is to encourage students to become urge them to programs and competitive events.1. a.internsb.traineesc.members2.a.participateb.trainc.win

Suppose a firm faces a fixed price of output, 푝푝= 1200. the firm hires workers from a union at a daily wage, 푤푤, to produce output according to the production function 푞푞= 2퐸퐸12. there are 225 workers in the union. any union worker who does not work for this firm is guaranteed to find nonunion employment at a wage of $96 per day. a.what is the firm’s labor demand function? b.if the firm is allowed to choose 푤푤, but then the union decides how many workers to provide (up to 225) at that wage, what wage will the firm set? how many workers will the union provide? what is the firm’s output and profit? what is the total income of the 225 union workers? c.now suppose that the union sets the wage, but the firm decides how many workers to hire at that wage (up to 225). what wage will the union set to maximize the total income of all 225 workers? how many workers will the firm hire? what is the firm’s output and profit? what is the total income of the 225 union workers? [hint: to maximize total income of union, take the first order condition with respect to w and set equal to 0.]

Consider the following information on stocks a, b, c and their returns (in decimals) in each state: state prob. of state a b c boom 20% 0.27 0.22 0.16 good 45% 0.16 0.09 0.07 poor 25% 0.03 0 0.03 bust 10% -0.08 -0.04 -0.02 if your portfolio is invested 25% in a, 40% in b, and 35% in c, what is the standard deviation of the portfolio in percent? answer to two decimals, carry intermediate calcs. to at least four decimals.