A discrete-time signal x [n] with fundamental period N0 = 4 has a DFT X[k] .
(a) Find X[?5] .
(b) Find X[22] .
(c) Find x[0] .
(d) Find x[3] .
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Problem 1.42 Link AB is to be made of a steel for which the ultimate normal stress is 65 ksi. Determine the cross-sectional area of AB for which the factor of safety will be 3.20. Assume that the link will be adequately reinforced around the pins at A and B.
Which of the following are common complaints that end up in the small claims court?
A) Work not completed when promised B) Poor workmanship C) Overcharging D) All of the above
Technician A says that HEV compressors may be both electrically and belt driven. Technician B says that scroll type A/C compressors contain rotating scrolls to pressurize the refrigerant. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Which of the following is true of barrel faced piston rings?
A. Increased service life but a less effective seal. B. Lower cost and easier to install. C. A less effective seal but better heat transfer. D. A better seal and increased service life.