answers - waves and sound exam review - clarke's...
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![Page 1: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/1.jpg)
SPH3U Exam Review
![Page 2: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/2.jpg)
1. The speed of sound in water is ____________ the speed of sound in air.
A. faster than B. slower than C. the same as D. Sound does not travel through water.
![Page 3: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/3.jpg)
1. The speed of sound in water is ____________ the speed of sound in air.
*A. faster thanB. slower than C. the same as D. Sound does not travel through water.
![Page 4: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/4.jpg)
2. In a sound wave, rarefactions are areas of:
A. high amplitude B. low amplitude C. high pressure D. low pressure
![Page 5: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/5.jpg)
2. In a sound wave, rarefactions are areas of:
A. high amplitude B. low amplitude C. high pressure *D. low pressure
![Page 6: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/6.jpg)
3. If the frequency of a sound wave is increased, the sound will have:
A. a faster speed B. a higher pitch C. more energy D. all of the above
![Page 7: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/7.jpg)
3. If the frequency of a sound wave is increased, the sound will have:
A. a faster speed *B. a higher pitch C. more energy D. all of the above
![Page 8: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/8.jpg)
4. 1 m away from a sound, the intensity is 60 dB. What is the intensity 10 m away?
A. 6 dB B. 30 dB C. 40 dB D. 50 dB
![Page 9: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/9.jpg)
4. 1 m away from a sound, the intensity is 60 dB. What is the intensity 10 m away?
A. 6 dB B. 30 dB *C. 40 dB D. 50 dB
![Page 10: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/10.jpg)
5. If you move toward a sound with a frequency of 200 Hz, the apparent frequency of the sound will be __________ 200 Hz.
A. less than B. greater than C. equal to D. It cannot be determined.
![Page 11: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/11.jpg)
5. If you move toward a sound with a frequency of 200 Hz, the apparent frequency of the sound will be __________ 200 Hz.
A. less than *B. greater than C. equal to D. It cannot be determined.
![Page 12: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/12.jpg)
6. Two loudspeakers are placed about 70 cm apart. Each speaker is emitting sound with the same frequency. As you walk slowly past the loudspeakers, you hear alternating soft and loud sounds. This effect is best explained by:
A. diffraction B. interference C. reflection D. refraction
![Page 13: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/13.jpg)
6. Two loudspeakers are placed about 70 cm apart. Each speaker is emitting sound with the same frequency. As you walk slowly past the loudspeakers, you hear alternating soft and loud sounds. This effect is best explained by:
A. diffraction *B. interference C. reflection D. refraction
![Page 14: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/14.jpg)
7. A tuning fork has a frequency of 256 Hz. When the tuning fork and a piano key are sounded together, beats of frequency 2 Hz are heard. What is the frequency of the sound produced by the piano?
A. 254 Hz B. 258 Hz C. 512 Hz D. either A or B
![Page 15: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/15.jpg)
7. A tuning fork has a frequency of 256 Hz. When the tuning fork and a piano key are sounded together, beats of frequency 2 Hz are heard. What is the frequency of the sound produced by the piano?
A. 254 Hz B. 258 Hz C. 512 Hz *D. either A or B
![Page 16: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/16.jpg)
8. Resonance occurs when the frequency of the forcing vibration is _____________ the natural frequency of the object.
A. the same as B. greater than C. less than D. both A and B
![Page 17: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/17.jpg)
8. Resonance occurs when the frequency of the forcing vibration is _____________ the natural frequency of the object.
*A. the same as B. greater than C. less than D. both A and B
![Page 18: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/18.jpg)
9. An open air column is made to resonate in air at 25oC and air at 0oC. The pitch of the sound produced is:
A. higher in air at 25oC B. higher in air at 0oCC. the same in both cases D. It cannot be determined.
![Page 19: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/19.jpg)
9. An open air column is made to resonate in air at 25oC and air at 0oC. The pitch of the sound produced is:
*A. higher in air at 25oC B. higher in air at 0oCC. the same in both cases D. It cannot be determined.
![Page 20: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/20.jpg)
10. An air column open at one end only is increased in length. The air column first resonates with a given tuning fork when the length of the air column is 20 cm. The next length that will resonate with the same tuning fork is:
A. 30 cm B. 40 cm C. 60 cm D. 80 cm
![Page 21: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/21.jpg)
10. An air column open at one end only is increased in length. The air column first resonates with a given tuning fork when the length of the air column is 20 cm. The next length that will resonate with the same tuning fork is:
A. 30 cm B. 40 cm *C. 60 cm D. 80 cm
![Page 22: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/22.jpg)
1. What is ultrasound? What is infrasound?
![Page 23: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/23.jpg)
1. What is ultrasound? What is infrasound?
Ultrasound: sound of frequencies above the range of human hearing (> 20 kHz)
Infrasound: sound of frequencies below the range of human hearing (< 20 Hz)
![Page 24: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/24.jpg)
2. Sketch the standing wave patterns of the first and second harmonics of an open air column. Label nodes and antinodes.
![Page 25: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/25.jpg)
2. Sketch the standing wave patterns of the first and second harmonics of an open air column. Label nodes and antinodes.
Node Node Node
Antinode Antinode Antinode AntinodeAntinode
![Page 26: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/26.jpg)
1. A lightning flash is seen 8.0 s before the rumble of the thunder is heard. Find the distance to the lightning flash if the temperature is 21oC.
![Page 27: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/27.jpg)
1. A lightning flash is seen 8.0 s before the rumble of the thunder is heard. Find the distance to the lightning flash if the temperature is 21oC.
sm
Csm
Csm
v
Cv
Tv
sm
sm
6.344
216.0332
6.0332
![Page 28: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/28.jpg)
1. A lightning flash is seen 8.0 s before the rumble of the thunder is heard. Find the distance to the lightning flash if the temperature is 21oC.
?
0.8
6.344
d
st
vsm
kmor
msd
tvdt
dv
sm
8.2
8.27560.86.344
![Page 29: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/29.jpg)
2. A string resonates with a fundamental frequency of 1024 Hz. The speed of sound in the string is 1800 m/s. (a) Sketch the standing wave pattern and (b) calculate the length of the string.
![Page 30: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/30.jpg)
2. A string resonates with a fundamental frequency of 1024 Hz. The speed of sound in the string is 1800 m/s. (a) Sketch the standing wave pattern and (b) calculate the length of the string.
![Page 31: Answers - Waves and Sound Exam Review - Clarke's Classesclarkesclasses.weebly.com/uploads/6/4/0/7/6407075/... · 2018. 10. 2. · Waves and Sound Author: officeuser Created Date:](https://reader035.vdocuments.mx/reader035/viewer/2022071610/614920e99241b00fbd675bd1/html5/thumbnails/31.jpg)
2. A string resonates with a fundamental frequency of 1024 Hz. The speed of sound in the string is 1800 m/s. (a) Sketch the standing wave pattern and (b) calculate the length of the string.
?
?
1800
1024
L
v
Hzf
sm
mmL
mHz
f
vfv
sm
88.0758.1
758.11024
1800
21
21