Power cycles typically have an efficiency well below the efficiency of a Carnot cycle. Which of the following is most responsible for this?
A) Friction
B) Heat transfer across a finite temperature difference
C) Heat transfer from pipes connecting the various components
D) Pressure drops in pipes
B) Heat transfer across a finite temperature difference
Heat transfer across a large temperature difference, which occurs in the combustion process, is
highly irreversible. The losses in A, C¸ and D are relatively small.
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Which order of insects contains thrips?
a. Thysanoptera c. Hemiptera b. Lepidoptera d. Coleoptera
The reliability of power from the national electrical grid is presently _____
a. 72.4 percent b. 86.8 percent c. 98.2 percent d. 99.9 percent
Find the first three numerical values, starting at time n = 0 , of the impulse response of the discrete-time system described by the difference equation
What will be an ideal response?
Name the method used when a viewing arrow with a view identification letter points to the location from where the view is taken. The auxiliary view is then placed in any desired location on the sheet and in the same orientation as the reference arrow. The view identification letter is placed above the auxiliary view.
A. orientation arrow method B. location arrow method C. position arrow method D. reference arrow method E. none of the above