Business Driven Information Systems
6th Edition
ISBN: 9781260004717
Author: Paige Baltzan
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 7, Problem 10RQ
To determine
The way in which Wi-Fi works.
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Q2:
A 208V, Y-connected synchronous motor is drawing 40A at unity power factor from a 208V power
system. The field current flowing under these conditions is 2.7A. Its synchronous reactance is 0.82 and its
armature resistance is 0.2 2. Assume a linear open-circuit characteristic.
1- Find EA and the torque angle.
2- How much field current would be required to make the motor operate at 0.8 PF lagging.
3- How much field current would be required to make the motor operate at 0.8 PF leading.
4- How much field current would be required to make the motor operate at unity PF.
A square flexible foundation of width B applies a uniform pressure go to the underlying ground.
(a) Determine the vertical stress increase at a depth of 0.625B below the center using Aσ beneath the corner of a uniform rectangular load given by Aσ =
Variation of Influence Value I
qoI. Use the table below.
n
0.8
1.0
m 0.2 0.4 0.5
0.6
0.2 0.01790 0.03280 0.03866 0.04348 0.05042 0.05471
0.4 0.03280 0.06024 0.07111 0.08009 0.09314 0.10129
0.5 0.03866 0.07111 0.08403 0.09473 0.11035 0.12018
0.6 0.04348 0.08009 0.09473 0.10688 0.12474 0.13605
0.8 0.05042 0.09314 0.11035 0.12474 0.14607 0.15978
1.0 0.05471 0.10129 0.12018 0.13605 0.15978 0.17522
(Enter your answer to three significant figures.)
Ασ/90
=
(b) Determine the vertical stress increase at a depth of 0.625B below the center using the 2 : 1 method equation below.
90 x B x L
Aσ =
(B+ z) (L + z)
(Enter your answer to three significant figures.)
Ασ/90 =
(c) Determine the vertical stress increase at a depth of 0.625B below the center using…
cases:
Compare the Poisson approximation with the correct binomial probability for the following
a. P{X=2} when n = 8, p = 0.2
b. P{X 5} when n
=
10, p = 0.5
c. P{X=0} when n = 20, p = 0.2
d. P{X=3} when n = 9, p = 0.1
Chapter 7 Solutions
Business Driven Information Systems
Ch. 7 - Prob. 1OCQCh. 7 - Prob. 2OCQCh. 7 - Prob. 3OCQCh. 7 - Prob. 4OCQCh. 7 - Prob. 5OCQCh. 7 - Prob. 6OCQCh. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQ
Ch. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 1CCOCh. 7 - Prob. 2CCOCh. 7 - Prob. 3CCOCh. 7 - Prob. 4CCOCh. 7 - Prob. 1CCTCh. 7 - Prob. 2CCTCh. 7 - Prob. 3CCTCh. 7 - Prob. 4CCTCh. 7 - Prob. 1CBTCh. 7 - Prob. 2CBTCh. 7 - Prob. 3CBTCh. 7 - Prob. 4CBTCh. 7 - Prob. 5CBTCh. 7 - Prob. 6CBTCh. 7 - Prob. 7CBTCh. 7 - Prob. 8CBTCh. 7 - Prob. 9CBTCh. 7 - Prob. 10CBTCh. 7 - Prob. PIAYKBPCh. 7 - Prob. PIIAYKBPCh. 7 - Prob. PIIIAYKBPCh. 7 - Prob. PIVAYKBPCh. 7 - Prob. PVAYKBPCh. 7 - Prob. PVIAYKBPCh. 7 - Prob. PVIIAYKBPCh. 7 - Prob. PVIIIAYKBPCh. 7 - Prob. PIXAYKBP
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