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A refrigerant 22 condenser has four water passes and a total of 60 copper tubes that are14mm ID and have 2 mm wall thickness. The conductivity of copper is 390 W/m-K. Theoutside of the tubes is finned so that the ratio of outside to inside area is 1.7. The coolingwater flow through the condenser tubes is 3.8 L/s.
a) Calculate the water-side coefficient if the water is at an average temperature of 30 ºC. atwhich temperature k= 0.614 W/m-K, ρ= 996 kg/m3, and μ= 0.000803 Pa-s.
b) Using a mean condensing coefficient of 1420 W/m2-K, calculate the overall heat transfercoefficient based on the condensing area.
A company car that has a seating capacity of eight is to be used by eight employees who have formed a car pool. If only three of these employees can drive, how many possible seating arrangements are there for the group?
Compute the expected return and standard deviation for a portfolio formed between M and your choice in part (b). Then compute the weighted-average standard deviation of this portfolio and explain why the portfolio’s actual standard deviation is less ..
Use traces to sketch and describe the quadric surface. x2 + 4y2 - 25z2 = 100. At what points does the curve r (t) = ti + (4t-t2)k intersect the parabolid z = x2 + 3y2?
Plot the time series of daily outgoing rate of communications. Describe the main features of this time series.
Let F be field. Let f: F[x] -> F the map that sends every polynomial to the sum of its coefficients. Prove that f is a ring homomorphism and describe its kernel
What is the average of these five amounts?
explain how the applications of integer programming differ from those of linear programming. give specific instances in
the management of xyz corporation is considering relocating the corporate office to a new location outside the capital
Which confidence interval is more practical and useful in a business situation? Why?
To buy a laptop, Susan receives a $2000 loan at a 6.5% annual interest rate on January 10. The loan is due May 15. The year is not a leap year. Round the answers to the nearest cent (nearest hundredths)
A. Use vector techniques to prove that a triangle and its medial triangle have the same centroid, stating each step of the proof. Provide written justification for each step of your proof.
You are trying to sell your audio system (an amplifier and speakers) to raise money for an upcoming trip to overseas. The system works great, and audiophile friend tell you that if he were in the market for this kind of equipment (which he isn't),..
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