While having his vacation in Sta. Ana, Maliksi notices that four wave crests pass a certain point every 20.0 seconds. He also notes that each wave crest is about 2.0 meters apart. What is the frequency of the wave that Maliksi is observing? A. 0.05 Hz C. 2 Hz B. 0.2 Hz D. 4 Hz Referring to problem 23, what is the speed of the wave? A. 0.1 m/s C. 4 m/s B. 0.4 m/s D. 8 m/s

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Chapter34: Electromagnetic Waves
Section: Chapter Questions
Problem 34.60AP: A microwave source produces pulses of 20.0GHz radiation, with each pulse lasting 1.00 ns. A...
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23. While having his vacation in Sta. Ana, Maliksi notices that four wave crests pass a certain point every
20.0 seconds. He also notes that each wave crest is about 2.0 meters apart. What is the frequency of the
wave that Maliksi is observing?
A. 0,05 Hz
В. 0.2 Hz
С. 2 Hz
D. 4 Hz
24. Referring to problem 23, what is the speed of the wave?
A. 0.1 m/s
B. 0.4 m/s
C. 4 m/s
D. 8 m/s
For Items 25 - 28, refer on the problem below
A sinusoidal wave traveling in the positive x direction has amplitude of 10.0 cm, a wavelength of 10.0 cm,
and a frequency of 5.00 Hz. The vertical position of an element of the medium at t = 0s and x = 0 m is
10.0 cm. Note: Units in kg-m-s system
25. What is the wave number(x)?
0.157 rad/m
с. 62.8 rad/m
D. 68.2 rad/m
А.
0.175 rad/m
В.
26. What is the period of the wave(T)?
A. 0.2 Hz
В. 2 Нz
С. 1.2 Hz
D. 2.1 Hz
27. What is the angular frequency (w)of the wave?
A. 31.42 rad,
В. 31.24 rad/,
С. 34.12 rad/,
D. 34.42 rad,
28. What is the speed (v) of the wave?
A. 0.5 m/s
в. 1.0 m/s
c. 5.0 m/s
D. 1.0 m/
29. What sinusoidal wave function, y(x,t) = Asin(kx – wt), was formed by combining the data
computed in Items 26-28?
A. y(x, t) = 0.10sin(62.8x – 31.42t)
В. у(х, с) %3D 0.10sin(68.2x - 34.12)
C. y(x, t) = 0.10sin(0.157x – 31.24t)
D. y(x, t) = 0.10sin(0.175x – 34.42t)
30. The intensity of monochromatic light is in the ratio 16:1. Calculate the second distance if the first
distance is 6 m.
A. 21 m
В. 26 m
С. 24 m
D. 27 m
31. The intensity of light is 800 at 400 cm away from the source. What is the intensity of the light of a
distance 3 m away from the light source?
A. 1522.7 W/m^2
C. 1822.2 W/m^2
В.
1622.5 W/m^2
D. 1422.2 W/m^2
32. If a bright flashlight has a light intensity of 15.0 candela at a distance 1.00 m from the lens, what is the
intensity of the flashlight 100.0 m from the lens?
A. 0.00015
C. 0.00165
B. 0.00150
D. 0.0150
33. Two wave pulses, as shown in the image on the right, with equal positive amplitudes travel on a cord
Transcribed Image Text:ll TM LTE 2:28 PM cdn.fbsbx.com Done 23. While having his vacation in Sta. Ana, Maliksi notices that four wave crests pass a certain point every 20.0 seconds. He also notes that each wave crest is about 2.0 meters apart. What is the frequency of the wave that Maliksi is observing? A. 0,05 Hz В. 0.2 Hz С. 2 Hz D. 4 Hz 24. Referring to problem 23, what is the speed of the wave? A. 0.1 m/s B. 0.4 m/s C. 4 m/s D. 8 m/s For Items 25 - 28, refer on the problem below A sinusoidal wave traveling in the positive x direction has amplitude of 10.0 cm, a wavelength of 10.0 cm, and a frequency of 5.00 Hz. The vertical position of an element of the medium at t = 0s and x = 0 m is 10.0 cm. Note: Units in kg-m-s system 25. What is the wave number(x)? 0.157 rad/m с. 62.8 rad/m D. 68.2 rad/m А. 0.175 rad/m В. 26. What is the period of the wave(T)? A. 0.2 Hz В. 2 Нz С. 1.2 Hz D. 2.1 Hz 27. What is the angular frequency (w)of the wave? A. 31.42 rad, В. 31.24 rad/, С. 34.12 rad/, D. 34.42 rad, 28. What is the speed (v) of the wave? A. 0.5 m/s в. 1.0 m/s c. 5.0 m/s D. 1.0 m/ 29. What sinusoidal wave function, y(x,t) = Asin(kx – wt), was formed by combining the data computed in Items 26-28? A. y(x, t) = 0.10sin(62.8x – 31.42t) В. у(х, с) %3D 0.10sin(68.2x - 34.12) C. y(x, t) = 0.10sin(0.157x – 31.24t) D. y(x, t) = 0.10sin(0.175x – 34.42t) 30. The intensity of monochromatic light is in the ratio 16:1. Calculate the second distance if the first distance is 6 m. A. 21 m В. 26 m С. 24 m D. 27 m 31. The intensity of light is 800 at 400 cm away from the source. What is the intensity of the light of a distance 3 m away from the light source? A. 1522.7 W/m^2 C. 1822.2 W/m^2 В. 1622.5 W/m^2 D. 1422.2 W/m^2 32. If a bright flashlight has a light intensity of 15.0 candela at a distance 1.00 m from the lens, what is the intensity of the flashlight 100.0 m from the lens? A. 0.00015 C. 0.00165 B. 0.00150 D. 0.0150 33. Two wave pulses, as shown in the image on the right, with equal positive amplitudes travel on a cord
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