EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN: 9781337516549
Author: Simmons
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 9, Problem 21R
To determine
Explain how the outlet box is marked for installation to support the ceiling fan.
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Matched filter in the frequency domain
(1.5) (a) Consider the signal s(t) in 3(c). Assuming that the unit of time is a millisecond
and the desired frequency resolution is 1 Hz, use the function contFT to compute
and plot |S(f).
(b) Use the function contFT to compute and plot the magnitude of the Fourier trans-
form of the convolution s * SMF numerically computed in 3(d). Also plot for
comparison |S(f)12, using the output of 5(a). The two plots should match.
(c) Plot the phase of the Fourier transform of s✶ SMF obtained in 5(b). Comment on
whether the plot matches your expectations.
Find Eigenvalues and Eigenvectors for the following matrices:
[10
4
A=0
2
0
3
1
1 -3
1. (20 pts) Plot the pulse and the FFT for a pulse with the following properties at x=0 and x=10
cm.
f=2 MHz
m=3
Ncyc=2, 6, 20
po 1 MPa (source pressure)
x=10 cm (propagates in a Newtonian fluid for 10 cm as a plane wave-not a sound beam)
a=0.5 dB/(MHz cm)
Consider 3 types of waves: sine, square, and sawtooth. (square and sawtooth only for grad
students)
Observe your plots and draw some conclusions. Discuss any possible issues you encounter.
2. (20 pts) We have the following 3 ultrasonic transducers:
a. Focused 1 MHz, 2.54 cm diameter, 5.08 cm focus
b. Focused 3 MHz, 2.54 cm diameter, 5.08 cm focus
c. Unfocused 0.1 MHz, 2.54 cm diameter
The transducers are operating in water (c=1486 m/s).
I. Plot the axial field for all transducers
II. Plot the focal transverse field for the focused transducers and the transverse field at the
Rayleigh distance (R_0) and at 2R_0 for the unfocused.
III. Assume source pressure of 0.1 MPa, and find the acoustic pressure in MPa at the location
(r=0, z=4.5…
Chapter 9 Solutions
EBK ELECTRICAL WIRING RESIDENTIAL
Ch. 9 - What circuit supplies the Master Bedroom?Ch. 9 - What unique type of electrical protection is...Ch. 9 - Prob. 4RCh. 9 - Prob. 5RCh. 9 - Prob. 6RCh. 9 - What is the estimated load in volt-amperes for the...Ch. 9 - Prob. 8RCh. 9 - How many conductors enter the ceiling fan/light...Ch. 9 - What type and size of box may be used for the...Ch. 9 - Prob. 11R
Ch. 9 - a. Does the circuit for the Master Bedroom have a...Ch. 9 - Approximately how many feet (meters) of 2-wire...Ch. 9 - If the cable is laid in notches in the corner...Ch. 9 - Prob. 15RCh. 9 - Prob. 16RCh. 9 - Prob. 17RCh. 9 - Prob. 18RCh. 9 - Prob. 19RCh. 9 - Show your calculations of how to select a proper...Ch. 9 - Prob. 21RCh. 9 - The following is a layout of the lighting circuit...Ch. 9 - Prob. 23RCh. 9 - Prob. 24RCh. 9 - May a standard electronic dimmer be used to...Ch. 9 - Prob. 26R
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