Business Driven Information Systems
Business Driven Information Systems
5th Edition
ISBN: 9780073402987
Author: Paige Baltzan Instructor, Amy Phillips Professor
Publisher: McGraw-Hill Education
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Chapter 5, Problem 7CBT
To determine

Compare three vendors of backup and recovery systems, and recommend one for a medium-sized business with 3500 employees that maintains information on the stock market.

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4. (a) State the conditions that must be met to ensure dynamic balance is achieved for long rotors. (b) A rotor carries three out-of-balance discs in planes A, B and C as shown in Figure 4. The out-of- balance mass x radius products of the rotor discs are tabulated in Table 4. The shaft is to be dynamically balanced by adding balancing masses in planes P and Q, spaced along the shaft at a distance da = 800 mm. Determine the magnitude mara and angular position of the balancing mass x radius product that must be added to plane Q. MBB Ов θε mdc Мага End View on Plane P P MBB MATA dA dB dc do Figure 4 moc Table 4 MATA = 0.6 kg mm 6A = 0° d₁ = 200 mm mers = 0.2 kg mm 6g = 45° dB = 400 mm mcrc = 0.4 kg mm Bc=240° dc = 600 mm Ans. (b) = 110.5°, moro = 0.2 kg mm
7.44 In the circuit of Fig. P7.44, what should the value of L be 104 rad/s so that i(t) is in-phase with u,(t)? at i(t) 50 Ω www Ds(f) z- 25 Ω 4μF L b Figure P7.44 Circuit for Problem 7.44.
4. Design a Positive Clamper circuit to obtain the given output waveform. Plot the corresponding input signal. Assume all diodes are ideal. (You do not need to specify the C or R values). V out 5 50 0 -11 |
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