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Repeat Problem 7.9 if the extrusion cross-section is elliptical with the major axis normal to the air flow and the same mass per unit length. The major axis of the elliptical cross section is 5.46 cm, and its perimeter is 12.8 cm.
Problem 7.9
A long, hexagonal copper extrusion is removed from a heat-treatment oven at 400°C and immersed in a 50°C airstream flowing perpendicular to its axis at 10 m/s. The surface of the copper has an emissivity of 0.9 due to oxidation. The rod is 3 cm across opposing flat sides and has a cross-sectional area of 7.79 cm2 and a perimeter of 10.4 cm. Determine the time required for the center of the copper to cool to 100°C.
A cylinder having a mass of 250 kg is to be supported by the cord which wraps over the pipe. Determine the largest vertical force F that can be applied to the cord without moving the cylinder.
Discuss how you can apply at least four of the weekly course learning outcomes throughout this course to your professional or personal life.
The system to be developed is intended to be operational in a small market firm or small business firm or even in home usage. Familiar examples might include an income tax preparation package by a small tax consulting firm.
How would you design the logical structure of Active Directory for the Rough Country Miles of Alaska, and what domain naming structure would you suggest?
Given n segments, find the minimal possible number of points such that each segment contains at least one point. The first line contains the number 1≤n≤100 of segments. Each of the following n lines contains two integers 0≤l≤r≤109 defining the endpoi..
Why or why not? If not, how would you go about trying to convince Mr. Rainer that some form of employee participation is important.
Outline two advantages and two limitations (each) of experiment-based analysis and simulation-based analysis.
What do you understand by thread-safety? Why is it required? And finally, how to achieve thread-safety in Java Applications?
Suppose you want to use a stored procedure to store a new row in COMPUTER. List the minimum list of parameters that need to be in the procedure. Describe, in general terms, the logic of the stored procedure.
Name and briefly describe three different types of malware that could infect a personal computer running the Windows operating system.
Determine the top three things that the head of IT should be doing to improve the skills of the IT staff.
We consider known-plaintext attacks on block ciphers by means of an exhaustive key search where the key is k bits long. The block length counts n bits with n > k.
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