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1. Air enters a pipe at 65°C and 200 kPa and leaves at 60°C and 175 kPa. It is estimated that heat is lost from the pipe in the amount of 3.3 kJ per kg of air flowing in the pipe. The diameter ratio for the pipe is D1/D2 = 1.4. Using constant specific heats for air, determine the inlet and exit velocities of the air.
2. Steam enters a nozzle with a low velocity at 150°C and 200 kPa, and leaves as a saturated vapor at 75 kPa. There is a heat transfer from the nozzle to the surroundings in the amount of 26 kJ for every kilogram of steam flowing through the nozzle. Determine
(a) the exit velocity of the steam and
(b) the mass flow rate of the steam at the nozzle entrance if the nozzle exit area is 0.001 m2 .
Disk caching is a technique that is used to speed up disk access by holding blocks of disk in memory. Discuss strategies that could be used to improve system performance with disk caching.
Then draw the minimum spanning tree rooted at a for this graph.
On what grounds does the algorithm of teaching calculate the directions and changes of weights in the steps of teaching?
Write code to handle the attachments in the message
Your final project is to look ahead to October when Apple will change Xcode from Objective C to SWIFT. In this project you will use your Xcode skills learned in this course to do a SWIFT project. Read the overview for the SWIFT implementation here: h..
A relation R(ABCDEF) and functional dependency set F={AB->CDEF ,F->C,C->A,B->D,D->E,F->B}. Find out the number of candidate keys
Display the lowest number of moves it took for the mole to escape and how many times did the mole escape in that fewest number of moves?
Write a program that reads in information for two runners in a race and swaps their information if necessary so that the runner with the faster time is stored in a variable called winner and the other is stored in a variable called loser. There ar..
In light of the article we read by Imran Awan this week, and the knowledge you have accumulated from this class consider the following questions:
Explain how only the knowledge of two dierent ciphertext sequences C = C1C2 Cn and C0 = C01 C02 C0n, obtained by applying the same secret key, can compromise the security of the system.
Which of the following would be part of an bi-annual corporate audit (see a-e) and what type of information would be gathered including which polices if any would apply?
What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?
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