How do communicating components determine which commands are for them and which commands are for other devices connected to the network?
What will be an ideal response?
Each communicating component contains a small microprocessor, an electronic address that tells the other components in the network what it is, and the electronics necessary for it to respond to the commands it receives.
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Where is alcohol used as a fuel? For what are alcohol by-products used?
What will be an ideal response?
With an installed capacity in excess of 11,000 MW, the Belo Monte dam complex on the Xingu River in Brazil will be the world’s third largest hydroelectric dam. The project is expected to cost $16 billion and will begin producing electricity upon completion by the end of 2019 after the 5-year construction period. Even though the dam will provide clean energy for millions of people, environmentalists are sharply opposed. They say it will devastate wildlife and the livelihoods of 40,000 people who live in the area to be flooded. Assume that the funding will occur evenly over the 5-year construction period (i.e., $3.2 billion per year), and that the disbenefits will be $66,000 for each displaced person and $1 billion for wildlife destruction. Further, assume the disbenefits will occur
evenly through the 5-year construction period and the benefits will begin in 2020 and continue indefinitely. At a discount rate of 8% per year, use the B/C ratio to determine the minimum annual benefits required to economically justify the project. What will be an ideal response?
What is the most likely cause of a failed transmission bearing with noticeable heat discoloration?
A. low oil level B. fretting C. fatigue D. dirt
Problem 1.27
For the assembly and loading of Prob. 1.7, determine (a) the average shearing stress in the pin at B, (b) the average bearing stress at B in member BD, (c) the average bearing stress at B in member ABC, knowing that this member has a 10 × 50-mm uniform rectangular cross section.