All questions of The Physics of Music for Grade 9 Exam
What is an ultrasound wave?- a) An ultrasound wave is a sound wave which has a frequency higher than 20 kHz
- b) An ultrasound wave is a sound wave which has the same frequency as an audible sound wave, however it has much greater energy
- c) Ultrasound waves are transverse waves
- d) There are no such things as ultrasound waves
Correct answer is option 'A'. Can you explain this answer?
a)
An ultrasound wave is a sound wave which has a frequency higher than 20 kHz
b)
An ultrasound wave is a sound wave which has the same frequency as an audible sound wave, however it has much greater energy
c)
Ultrasound waves are transverse waves
d)
There are no such things as ultrasound waves
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Tutorpedia Coaching answered |
20 kHz is the average upper limit for human hearing. Many animals including cats, dogs and bats can hear ultrasound
A car horn produces a sound wave of frequency 680 Hz. When the sound wave is travelling through air, it has a wavelength of 0.5 m. What is the speed of the sound wave?- a) 300 m/s
- b) 330 m/s
- c) 340 m/s
- d) 400 m/s
Correct answer is option 'C'. Can you explain this answer?
a)
300 m/s
b)
330 m/s
c)
340 m/s
d)
400 m/s
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Tutorpedia Coaching answered |
Light travels much faster so during a thunderstorm you see the lightning before hearing the thunder. If you count the time taken for the thunder to arrive after the flash, for every 3 seconds you count, the lightning was about one kilometre away
How do sound waves travel?- a) Vibrations through a medium
- b) Via a carrier particle called a photon
- c) Via a carrier particle called a neutrino
- d) Sound waves can only travel in a vacuum
Correct answer is option 'A'. Can you explain this answer?
a)
Vibrations through a medium
b)
Via a carrier particle called a photon
c)
Via a carrier particle called a neutrino
d)
Sound waves can only travel in a vacuum
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Tutorpedia Coaching answered |
They are waves of alternating higher and lower pressure
What is the pitch of a sound determined by?- a) Its amplitude
- b) Its frequency
- c) The medium through which it travels
- d) Sound waves all have the same pitch
Correct answer is option 'B'. Can you explain this answer?
a)
Its amplitude
b)
Its frequency
c)
The medium through which it travels
d)
Sound waves all have the same pitch
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Tutorpedia Coaching answered |
On the tonic sol-fa (doh, ray, mi etc) the first doh has a lower pitch than ray, which has a lower pitch than mi and so on
What is the loudness of a sound wave determined by?- a) The medium through which it travels
- b) Its amplitude
- c) Its frequency
- d) Sound waves all have the same loudness
Correct answer is option 'B'. Can you explain this answer?
a)
The medium through which it travels
b)
Its amplitude
c)
Its frequency
d)
Sound waves all have the same loudness
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Tutorpedia Coaching answered |
A larger amplitude means the energy carried by the waves is bigger, but the frequency and wavelength remain the same
What kind of a wave is a sound wave?- a) Latitudinal
- b) Electromagnetic
- c) Longitudinal
- d) Transverse
Correct answer is option 'C'. Can you explain this answer?
a)
Latitudinal
b)
Electromagnetic
c)
Longitudinal
d)
Transverse
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Tutorpedia Coaching answered |
The energy and vibrations are in the same direction
If a sound wave is made louder, what happens to the amount of energy the wave has?- a) The energy increases
- b) The energy decreases
- c) The energy remains constant
- d) More information is required to answer the question
Correct answer is option 'A'. Can you explain this answer?
a)
The energy increases
b)
The energy decreases
c)
The energy remains constant
d)
More information is required to answer the question
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Tutorpedia Coaching answered |
The pressure difference between compressions and rarefactions is greater
If the pitch of a sound wave is increased, does the time period between waveforms increase or decrease?- a) Increases
- b) Decreases
- c) Remains the same
- d) Randomly changes to a discrete value
Correct answer is option 'B'. Can you explain this answer?
a)
Increases
b)
Decreases
c)
Remains the same
d)
Randomly changes to a discrete value
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Tutorpedia Coaching answered |
Increasing the pitch means the sound wave vibrates more rapidly therefore there will be less time between the arrival of each successive compression or rarefaction
What are echoes?- a) An impressionist repeating the noise
- b) Reflections of sounds
- c) Reflections of light
- d) Refraction of sounds
Correct answer is option 'B'. Can you explain this answer?
a)
An impressionist repeating the noise
b)
Reflections of sounds
c)
Reflections of light
d)
Refraction of sounds
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Tutorpedia Coaching answered |
Common examples used in the GCSE are sonar from ships and submarines to measure depth, bats using echo location to find their prey and echoes in the mountains
The car horn and car unfortunately find themselves under water in a river. The car horn still produces a sound wave with a frequency of 680 Hz, however the speed of the sound is dramatically increased to 1485 m/s. What is the wavelength of the sound wave in water?- a) 0.46 m
- b) 0.92 m
- c) 2.18 m
- d) 1,009,800 m
Correct answer is option 'C'. Can you explain this answer?
a)
0.46 m
b)
0.92 m
c)
2.18 m
d)
1,009,800 m
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Tutorpedia Coaching answered |
The denser the medium, the faster a sound wave will travel
Chapter doubts & questions for The Physics of Music - Physics 2025 is part of Grade 9 exam preparation. The chapters have been prepared according to the Grade 9 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Grade 9 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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