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Question: A 4-m-long tube is subjected to uniform wall heat flux. The tube has an inside diameter of 0.0149 m and a flow rate of 7.8 × 10-5 m3/s. The liquid flowing inside the tube is ethylene glycol-distilled water mixture with a mass fraction of 0.5. Determine the apparent (developing) friction factor at the location x/D = 20 if the inlet configuration of the tube is:
(a) re-entrant and
(b) square-edged. At this location, the local Grashof number is Gr = 28,090 and the properties of the mixture of distilled water and ethylene glycol are: Pr = 20.9, v = 2.33 × 10-6 m2 /s, and µb/µs = 1.25.
How do network effects help Facebook fend off smaller social-networking rivals? Could an online retailer doing half as much business compete on an equal footing with Amazon in terms of costs? Explain.
Write a program to simulate a deck of 52 playing cards. Represent your deck as a 2D Array where the value in the cell is the position of the card in the deck. Represent the names for the suits and faces as an array of Strings.
Create a third page with a search box so that you can find customer from the database based on name. (5) Customer Example Page Name: * Phone: E-mail Address: * City: Country: How did you find us? Search Engine?Link From Another Site?News Article? ..
Explain why modern machines consist of multiple levels of virtual machines. Why not just have two levels, the digital logic level and the high-language programming level?
When you try to open file in image viewer, message is displayed indicating that file is corrupt. Write 2-3 page report describing how to recover the file, orkty.zip, for further investigation.
During an exec call in Minix, it tests for an adequate hole before releasing the current process memory. Reprogram this algorithm to do better.
When the control input is ‘1' the counter counts up; when it is ‘0' the counter counts down. The counter should not, however, wrap round. When the all 1s or all 0s states are reached the counter should stop.
If G is non-amenable, then br G > 1 by this exercise combined with the result of Benjamini and Schramm (1997) mentioned at the end of Section 6.1. Our bound for trees, Proposition 13.3, can be extended to general graphs as follows, but it is not a..
What is the simplest form of the Boolean function y′ . (x + y)?
With 10 receivers, what is the probability half will send in one particular 5% subinterval? Multiply this by 20 for an estimate of the probability half will all send in the same arbitrary 5% subinterval. Hint: How many ways can we choose 5 receive..
Explain what you believe to be the main business purpose of charts in Excel. Next, discuss whether or not you believe Excel would still be a useful tool if the charting features were removed from the application.
State the advantages and disadvantages of alloying steel with silicon for use as magnetic materials in transformer and electric machines.
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