Sound — Paper 2 · IGCSE Physics 0625

24 A sound wave travels from a point X to a point Y. X Y Which diagram represents the movement of the air molecules, due to the sound wave, in the region between X and Y? A B C D

1 marks

Answer: D

This question in 0625/22 Feb/March 2016

25 The speed of sound in air is 340 m / s. Which row gives typical values for the speed of sound in a liquid and in a solid? speed of sound in speed of sound in a liquid / (m / s) a solid / (m / s) A 250 180 B 250 5000 C 1500 180 D 1500 5000

1 marks

Answer: D

This question in 0625/22 Feb/March 2016

20 Sound waves of frequency 2.0 kHz travel through a substance at a speed of 800 m / s. What is the wavelength of the waves? A 0.40 m B 2.5 m C 400 m D 1600 m

1 marks

Answer: A

This question in 0625/21 May/June 2016

24 A sound wave travels through air as a series of compressions and rarefactions. Which row correctly compares the air pressure in a compression and the air pressure in a rarefaction to the air pressure nearby where there is no sound wave? air pressure in air pressure in a compression a rarefaction A higher higher B higher lower C lower higher D lower lower

1 marks

Answer: B

This question in 0625/21 May/June 2016

25 A sound wave has a certain amplitude and a certain frequency. A second sound wave is quieter and lower in pitch than the first sound wave. The second wave has A a larger amplitude and a greater frequency. B a larger amplitude and a smaller frequency. C a smaller amplitude and a greater frequency. D a smaller amplitude and a smaller frequency.

1 marks

Answer: D

This question in 0625/21 May/June 2016

25 The sound from a loudspeaker must pass through two materials to reach a microphone. loudspeaker microphone material 1 material 2 Which combination of materials gives the shortest time for the sound to reach the microphone? material 1 material 2 A air hydrogen B air water C copper aluminium D water oil

1 marks

Answer: C

This question in 0625/23 May/June 2016

26 Which range of wave frequencies includes only sounds that can be heard by a human with normal hearing? A 3.0 Hz to 300 Hz B 30 Hz to 3000 Hz C 300 Hz to 30 000 Hz D 3000 Hz to 300 000 Hz

1 marks

Answer: B

This question in 0625/23 May/June 2016

25 A girl notices that, when she shouts into a cave, she hears an echo. Which wave property causes the echo? A diffraction B dispersion C reflection D refraction

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2016

26 The diagrams represent the displacement in four different sound waves. All the diagrams are drawn to the same scale. Which diagram represents the sound with the highest pitch? A B displacement displacement 0 time 0 time 0 0 C D displacement displacement 0 time 0 time 0 0

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2016

25 A girl notices that, when she shouts into a cave, she hears an echo. Which wave property causes the echo? A diffraction B dispersion C reflection D refraction

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2016

26 Which property of a sound wave affects the loudness of the sound? A amplitude B frequency C speed D wavelength

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2016

20 A man is talking at the side of a house. He can be heard by a woman at the front of the house even though she cannot see him. What is the explanation for this? A Sound waves are longitudinal and light waves are transverse. B Sound waves are transverse and light waves are longitudinal. C The sound waves have a long wavelength and the light waves have short wavelength. D The sound waves have a short wavelength and the light waves have long wavelength.

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2016

24 A girl notices that, when she shouts into a cave, she hears an echo. Which wave property causes the echo? A diffraction B dispersion C reflection D refraction

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2016

25 A man stands 110 m from a high wall. He makes a short, sharp sound and then hears an echo from the wall. The speed of sound in air is 330 m / s. How long after making the sound does the man hear the echo? A 0.33 s B 0.67 s C 1.5 s D 3.0 s

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2016

23 Which statement about sound waves is correct? A They are able to travel through a vacuum. B They are able to travel through solids. C They are transverse waves. D They travel at the same speed in all substances.

1 marks

Answer: B

This question in 0625/22 Feb/March 2017

24 Which statement about ultrasound is correct? A It is produced by a rapidly vibrating source. B It is uncomfortable to human ears. C Its frequency must be greater than 300 kHz. D It travels the fastest in a vacuum.

1 marks

Answer: A

This question in 0625/22 Feb/March 2017

23 A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch. What effect does this have on the amplitude and on the frequency of the sound? amplitude frequency A larger greater B larger smaller C smaller greater D smaller smaller

1 marks

Answer: A

This question in 0625/21 May/June 2017

23 A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch. What effect does this have on the amplitude and on the frequency of the sound? amplitude frequency A larger greater B larger smaller C smaller greater D smaller smaller

1 marks

Answer: A

This question in 0625/22 May/June 2017

23 A fire alarm is not loud enough and the pitch is too low. An engineer adjusts the alarm so that it produces a louder note of a higher pitch. What effect does this have on the amplitude and on the frequency of the sound? amplitude frequency A larger greater B larger smaller C smaller greater D smaller smaller

1 marks

Answer: A

This question in 0625/23 May/June 2017

25 Which wavefront is travelling at a speed closest to that of a sound wave through a solid? A one that moves 10 m in 0.01 s B one that moves 50 m in 0.5 s C one that moves 1000 m in 100 s D one that moves 2000 m in 2000 s

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2017

26 Different waves travel through air. Which waves have the greatest difference in speed? A ultrasound waves and sound waves B ultrasound waves and ultraviolet waves C ultraviolet waves and light waves D ultraviolet waves and radio waves

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2017

27 A student stands 180 m in front of a vertical, flat cliff and bangs together two pieces of wood to make a short, loud sound. A timer records the echo of the sound 1.5 seconds after the pieces of wood are banged together. Based on this result, what is the speed of sound? A 120 m / s B 240 m / s C 270 m / s D 540 m / s

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2017

25 Different waves travel through air. Which waves have the greatest difference in speed? A ultrasound waves and sound waves B ultrasound waves and ultraviolet waves C ultraviolet waves and light waves D ultraviolet waves and radio waves

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2017

26 The speed of sound is different in different states of matter. The speed of sound in water is 1500 m / s. Which row correctly compares the speed of sound in ice and the speed of sound in steam with the speed of sound in water? speed of sound in ice speed of sound in steam m / s m / s A less than 1500 less than 1500 B less than 1500 more than 1500 C more than 1500 less than 1500 D more than 1500 more than 1500

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2017

27 A student finds that it takes sound 0.33 seconds to travel 100 metres. From this information, what is the speed of sound? A 30 m / s B 60 m / s C 300 m / s D 600 m / s

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2017

23 A sound wave travels from a medium in one state into the same medium but in another state. This causes the speed of the wave to change from approximately 300 m / s to approximately 3000 m / s. Between which two states is the sound wave travelling? A gas to solid B liquid to gas C liquid to solid D solid to liquid

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2017

26 The diagram shows the Earth and its surroundings. Through which labelled region can sound not be transmitted? A B C D sea land atmosphere outer space (water) (rock) (air) (vacuum) not to scale

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2017

27 Different waves travel through air. Which waves have the greatest difference in speed? A ultrasound waves and sound waves B ultrasound waves and ultraviolet waves C ultraviolet waves and light waves D ultraviolet waves and radio waves

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2017

24 A dolphin has a range of audible frequencies of 150 Hz–150 kHz. Which range of frequencies can be heard both by humans with good hearing and by dolphins? A 20 Hz–150 Hz B 20 Hz–150 kHz C 20 kHz–150 kHz D 150 Hz–20 kHz

1 marks

Answer: D

This question in 0625/21 May/June 2018

24 A siren is emitting a sound. As time passes, the sound becomes louder and higher pitched. What is happening to the amplitude and to the frequency of the emitted sound wave? amplitude frequency A decreasing decreasing B decreasing increasing C increasing decreasing D increasing increasing

1 marks

Answer: D

This question in 0625/22 May/June 2018

23 The diagram shows the air molecules in part of a sound wave at a particular moment in time. X Which statement is not correct? A Earlier, there was compression at X. B Later, there will be a rarefaction at X. C This part of the wave is travelling horizontally across the page. D This part of the wave is travelling towards the top of the page.

1 marks

Answer: D

This question in 0625/23 May/June 2018

24 The diagram shows the ranges of human hearing and of ultrasound waves. range of ultrasound human hearing 0 101 102 103 104 105 106 2 × 101 2 × 104 To which characteristic of sound waves do the numbers on the diagram refer? A amplitude in cm B frequency in Hz C speed in metres / second D wavelength in metres

1 marks

Answer: B

This question in 0625/23 May/June 2018

26 A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet. Four microphones are placed equal distances from S. Which microphone detects the sound from S first? A air B D S ice water C

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2018

25 A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet. Four microphones are placed equal distances from S. Which microphone detects the sound from S first? A air B D S ice water C

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2018

25 A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet. Four microphones are placed equal distances from S. Which microphone detects the sound from S first? A air B D S ice water C

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2018

26 A sound wave passes a point. The air pressure at that point increases and then decreases 300 times every second. Which descriptions apply to this sound wave? the type of wave motion the frequency of the sound A longitudinal outside human hearing range B longitudinal within human hearing range C transverse outside human hearing range D transverse within human hearing range

1 marks

Answer: B

This question in 0625/22 Feb/March 2019

27 A boy stands 150 m from a wall. He claps and when he hears the echo, he immediately claps again. He continues this for some time. Another student has a stop-watch. She starts the watch on the first clap and stops it on the eleventh clap. The watch reads 10.0 s. Which value do her measurements give for the speed of sound in air? A 150 m / s B 170 m / s C 300 m / s D 330 m / s

1 marks

Answer: C

This question in 0625/22 Feb/March 2019

24 A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is reflected from a shoal of fish. The sound reaches the boat again after 1.2 s. The speed of sound in the water is 1500 m / s. boat shoal of fish How far below the bottom of the boat is the shoal of fish? A 450 m B 900 m C 1800 m D 3600 m

1 marks

Answer: B

This question in 0625/21 May/June 2019

25 What is the approximate value of the speed of sound in air at normal temperature? A 340 m / s B 34 000 m / s C 340 km / s D 3.0 × 108 m / s

1 marks

Answer: A

This question in 0625/21 May/June 2019

24 A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is reflected from a shoal of fish. The sound reaches the boat again after 1.2 s. The speed of sound in the water is 1500 m / s. boat shoal of fish How far below the bottom of the boat is the shoal of fish? A 450 m B 900 m C 1800 m D 3600 m

1 marks

Answer: B

This question in 0625/22 May/June 2019

25 An observer stands at the finish line of a 100 m race. He wants to time the winner’s run. He starts his stop-watch as soon as he sees the smoke from the starting gun instead of when he hears the bang. What is the reason for doing this? A Light travels much faster than sound. B There is a risk he might respond to an echo from a wall. C Humans react slower to sound than to light. D Humans react more quickly to sound than to light.

1 marks

Answer: A

This question in 0625/22 May/June 2019

20 Sound travels through air at a speed of 340 m / s. A source generates sound waves at a frequency of 1.2 kHz. What is the wavelength of the sound waves? A 0.28 m B 3.5 m C 280 m D 410 m

1 marks

Answer: A

This question in 0625/23 May/June 2019

24 A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is reflected from a shoal of fish. The sound reaches the boat again after 1.2 s. The speed of sound in the water is 1500 m / s. boat shoal of fish How far below the bottom of the boat is the shoal of fish? A 450 m B 900 m C 1800 m D 3600 m

1 marks

Answer: B

This question in 0625/23 May/June 2019

25 Which statement about ultrasound is correct? A It has a higher frequency than audible sound, and it is a longitudinal wave. B It has a higher frequency than audible sound, and it is a transverse wave. C It has a lower frequency than audible sound, and it is a longitudinal wave. D It has a lower frequency than audible sound, and it is a transverse wave.

1 marks

Answer: A

This question in 0625/23 May/June 2019

25 Which row gives a possible set of values for the speed of sound in ice, in water and in steam? speed of sound speed of sound speed of sound in ice in water in steam m/s m/s m/s A 500 1500 4000 B 1500 4000 500 C 4000 500 1500 D 4000 1500 500

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2019

26 Which row gives a possible set of values for the speed of sound in ice, in water and in steam? speed of sound speed of sound speed of sound in ice in water in steam m/s m/s m/s A 500 1500 4000 B 1500 4000 500 C 4000 500 1500 D 4000 1500 500

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2019

25 Which row gives a possible set of values for the speed of sound in ice, in water and in steam? speed of sound speed of sound speed of sound in ice in water in steam m/s m/s m/s A 500 1500 4000 B 1500 4000 500 C 4000 500 1500 D 4000 1500 500

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2019

24 The diagrams show examples of wave motion. 1 2 ripple tank drum waves on water waves in air 3 4 waves on a rope waves in a spring Which waves are longitudinal? A 1 only B 2 and 3 only C 2, 3 and 4 D 2 and 4 only

1 marks

Answer: D

This question in 0625/22 Feb/March 2020

28 The diagram shows compressions and rarefactions in air as a sound wave moves from left to right. rarefaction compression A quieter sound of the same frequency is made. What will happen to the number of particles in a region of rarefaction and in a region of compression? number of particles in number of particles in region of rarefaction region of compression A decrease decrease B decrease increase C increase decrease D increase increase

1 marks

Answer: C

This question in 0625/22 Feb/March 2020

25 Sound travels through air as a series of compressions and rarefactions. Which statement correctly compares a compression with a rarefaction? A In a compression the wavelength is longer than in a rarefaction. B In a compression the wavelength is shorter than in a rarefaction. C In a compression the density of the air is greater than in a rarefaction. D In a compression the density of the air is lower than in a rarefaction.

1 marks

Answer: C

This question in 0625/21 May/June 2020

25 A dolphin sends out a sound wave. An echo returns 0.010 s later from a fish which is 7.5 m from the dolphin. What is the speed of the sound wave in water? A 0.075 m / s B 0.15 m / s C 750 m / s D 1500 m / s

1 marks

Answer: D

This question in 0625/22 May/June 2020

25 Two people are standing outdoors on either side of a high wall. person 1 person 2 Person 1 can hear person 2 talking although he cannot see her. Which statement explains this? A The sound waves have diffracted around the wall. B The sound waves have passed unaffected through the wall. C The sound waves have reflected around the wall. D The sound waves have refracted around the wall.

1 marks

Answer: A

This question in 0625/23 May/June 2020

25 Which row gives possible values for the speed of sound? speed in gas speed in liquid speed in solid m / s m / s m / s A 972 1450 3560 B 972 3560 1450 C 1450 3560 972 D 3560 972 1450

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2020

26 A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which row describes the amplitude and the frequency of the sound? amplitude frequency A constant constant B constant varying C varying constant D varying varying

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2020

24 A student draws a diagram to illustrate the different sections of a longitudinal wave. Which labelled section is a rarefaction? A B D C

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2020

26 A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which row describes the amplitude and the frequency of the sound? amplitude frequency A constant constant B constant varying C varying constant D varying varying

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2020

26 A sound wave travels through air. What name is given to a region in which the air molecules are further apart than normal? A compression B contraction C rarefaction D vacuum

1 marks

Answer: C

This question in 0625/23 Oct/Nov 2020

27 A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which row describes the amplitude and the frequency of the sound? amplitude frequency A constant constant B constant varying C varying constant D varying varying

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2020

20 What is the approximate wavelength in air of the highest frequency sound that can be heard by a normal healthy person? A 0.02 m B 60 m C 20 000 m D 7 000 000 m

1 marks

Answer: A

This question in 0625/22 Feb/March 2021

26 The diagram represents a sound wave. X Y What are the names of the parts of the sound wave labelled X and Y? X Y A amplitude wavelength B compression rarefaction C rarefaction amplitude D wavelength compression

1 marks

Answer: B

This question in 0625/22 Feb/March 2021

27 The speed of sound is different in different states of matter. The speed of sound in liquid water is 1500 m / s. Which row correctly compares the speed of sound in ice and the speed of sound in water vapour with the speed of sound in water? speed of sound in ice speed of sound in steam m / s m / s A less than 1500 less than 1500 B less than 1500 more than 1500 C more than 1500 less than 1500 D more than 1500 more than 1500

1 marks

Answer: C

This question in 0625/22 Feb/March 2021

26 The sound from a loudspeaker must pass through two materials to reach a microphone. loudspeaker microphone material 1 material 2 Which combination of materials gives the shortest time for the sound to reach the microphone? material 1 material 2 A air hydrogen B air water C copper aluminium D water oil

1 marks

Answer: C

This question in 0625/22 May/June 2021

24 What is ultrasound? A sound waves that are so loud that they damage human hearing B sound waves that are too high-pitched for humans to hear C sound waves that are too low-pitched for humans to hear D sound waves that are too quiet for humans to hear

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2021

24 What is ultrasound? A sound waves that are so loud that they damage human hearing B sound waves that are too high-pitched for humans to hear C sound waves that are too low-pitched for humans to hear D sound waves that are too quiet for humans to hear

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2021

17 In the diagram, the mountaineer can hear the stream although he cannot see it. When he is closer to the gully, he can both hear and see the stream. When he is further from the gully, he can neither hear nor see the stream. gully mountaineer stream Which statement is not correct? A As he approaches the gully edge, he hears first the short wavelength, higher frequencies and then the long wavelength, lower frequencies. B As he approaches the gully edge, the sound becomes louder. C He hears the stream because some of the sound is diffracted. D He hears the stream because some of the sound is reflected from the opposite wall of the gully.

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2021

23 Which row gives the typical values of the speed of sound at room temperature in the materials stated? speed of sound m / s air water iron A 340 1500 5100 B 340 5100 1500 C 5100 1500 340 D 3.0  108 3.0  108 3.0  108

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2021

24 What is ultrasound? A sound waves that are so loud that they damage human hearing B sound waves that are too high-pitched for humans to hear C sound waves that are too low-pitched for humans to hear D sound waves that are too quiet for humans to hear

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2021

26 The diagram shows air particles in a sound wave. V W X Y Z Which row correctly identifies the position of a compression and position of a rarefaction? compression rarefaction A X Y B Y X C V Z D Z V

1 marks

Answer: A

This question in 0625/22 Feb/March 2022

22 A sound wave is created by a loudspeaker that vibrates backwards and forwards 96 000 times per minute. The speed of sound is 320 m / s. What is the wavelength of the sound wave? A 0.20 m B 5.0 m C 300 m D 18 000 m

1 marks

Answer: A

This question in 0625/21 May/June 2022

22 The speed of sound in air is 330 m / s. How do the speeds of sound in concrete and water compare with this speed? speed in speed in concrete water A greater greater B greater less C less greater D less less

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2022

24 An observer stands at the finish line of a 100 m race. He wants to time the winner’s run. He starts his stop-watch as soon as he sees the smoke from the starting gun instead of when he hears the bang. What is the reason for doing this? A Light travels much faster than sound. B There is a risk he might respond to an echo from a wall. C Humans react slower to sound than to light. D Humans react more quickly to sound than to light.

1 marks

Answer: A

This question in 0625/21 Oct/Nov 2022

17 A sound wave travels from air into water. Which row describes what happens to the frequency and the wavelength of the wave? frequency wavelength A decreases increases B decreases stays the same C stays the same decreases D stays the same increases

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2022

18 The diagram shows plane water waves in a ripple tank passing through a gap between two barriers and spreading out. barrier plane water waves barrier Which name is given to this effect? A diffraction B reflection C refraction D total internal reflection

1 marks

Answer: A

This question in 0625/22 Oct/Nov 2022

22 The diagram shows the air molecules in part of a sound wave at a particular moment in time. X Which statement is not correct? A Earlier, there was compression at X. B Later, there will be a rarefaction at X. C This part of the wave is travelling horizontally across the page. D This part of the wave is travelling towards the top of the page.

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2022

24 A 100 m race is started by firing a gun. The gun makes a bang and a puff of smoke at the same time. starter finishing judge 100 m When does the finishing judge see the smoke and when does he hear the bang? sees the smoke hears the bang A almost immediately almost immediately B almost immediately after about 0.3 s C after about 0.3 s almost immediately D after about 0.3 s after about 0.3 s

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2022

22 The diagram shows the air molecules in part of a sound wave at a particular moment in time. X Which statement is not correct? A Earlier, there was compression at X. B Later, there will be a rarefaction at X. C This part of the wave is travelling horizontally across the page. D This part of the wave is travelling towards the top of the page.

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2022

24 A 100 m race is started by firing a gun. The gun makes a bang and a puff of smoke at the same time. starter finishing judge 100 m When does the finishing judge see the smoke and when does he hear the bang? sees the smoke hears the bang A almost immediately almost immediately B almost immediately after about 0.3 s C after about 0.3 s almost immediately D after about 0.3 s after about 0.3 s

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2022

23 A student makes a list of some applications of waves. 1 medical scanning of soft tissue 2 sterilising water 3 using sonar to calculate ocean depths Which applications use ultrasound waves? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: C

This question in 0625/22 Feb/March 2023

22 Student X fires a starting pistol which produces smoke and sound. Student Y is standing 100 m away and sees the smoke the instant it is produced. The speed of sound in air is 340 m / s. What is the time delay between student Y seeing the smoke and hearing the sound? A 0.29 s B 0.59 s C 1.7 s D 3.4 s

1 marks

Answer: A

This question in 0625/21 May/June 2023

22 A boy shouts and hears the echo from a tall building 2.2 s later. The speed of sound in air is 330 m / s. How far away from the boy is the building? A 150 m B 300 m C 360 m D 730 m

1 marks

Answer: C

This question in 0625/22 May/June 2023

22 A ship sounds its horn when it is 790 m from a cliff. A passenger on the ship hears the echo 4.8 s later. What is the speed of the sound? A 165 m / s B 330 m / s C 340 m / s D 1896 m / s

1 marks

Answer: B

This question in 0625/23 May/June 2023

23 The element mercury exists as a solid, a liquid or a gas. Which row gives a possible set of values of the speeds of sound through mercury? speed of sound in speed of sound in speed of sound in frozen mercury liquid mercury mercury vapour m / s m / s m / s A 250 1500 2500 B 250 2500 1500 C 1500 250 2500 D 2500 1500 250

1 marks

Answer: D

This question in 0625/21 Oct/Nov 2023

23 Which row gives typical values for the speed of sound in a solid and in a gas? speed of sound in a solid speed of sound in a gas m / s m / s A 3 30 B 30 3 C 300 3000 D 3000 300

1 marks

Answer: D

This question in 0625/22 Oct/Nov 2023

23 Which row gives approximate values for the speed of sound in copper, water and air? speed of sound in copper speed of sound in water speed of sound in air m / s m / s m / s A 4500 1500 350 B 350 4500 1500 C 1500 4500 350 D 4500 350 1500

1 marks

Answer: A

This question in 0625/23 Oct/Nov 2023

18 The range of audible frequencies for elephants is 10 Hz to 12 000 Hz, and for horses is 55 Hz to 33 000 Hz. Which statement about the range of audible frequencies for a healthy human ear is correct? A The human ear can hear all sounds heard by both elephants and horses. B The human ear can hear all sounds heard by elephants but not all those heard by horses. C The human ear can hear all sounds heard by horses but not all those heard by elephants. D The human ear cannot hear all sounds heard by elephants nor those heard by horses.

1 marks

Answer: D

This question in 0625/22 Feb/March 2024

22 A sound wave travels at 330 m / s. The distance between the centre of a compression and the centre of the nearest rarefaction in the sound wave is 2.5 cm. What is the frequency of the sound wave? A 66 Hz B 130 Hz C 6600 Hz D 13 000 Hz

1 marks

Answer: C

This question in 0625/21 May/June 2024

23 Which waves are used in the medical scanning of soft tissue? A gamma rays B infrared C microwaves D ultrasound

1 marks

Answer: D

This question in 0625/21 May/June 2024

24 Which row gives the typical values of the speed of sound at room temperature in the materials stated? speed of sound m / s air water iron A 340 1500 5100 B 340 5100 1500 C 5100 1500 340 D 3.0  108 3.0  108 3.0  108

1 marks

Answer: A

This question in 0625/23 May/June 2024

23 A candle flame is placed in front of a loudspeaker. The loudspeaker produces a sound wave that causes air particles to vibrate. The vibrating air particles make the candle flame vibrate in the same direction as the air particles. candle flame loudspeaker Which row shows the direction of vibration of the candle flame and the nature of sound waves? direction of nature of vibration sound waves A longitudinal B transverse C longitudinal D transverse

1 marks

Answer: C

This question in 0625/21 Oct/Nov 2024

23 The starter in an athletics race fires the starting pistol. There is a wall 60 m from the starter. Take the speed of sound as 330 m / s. wall NOT TO starter 60 m SCALE athletes athletics track How long after firing the pistol does the starter hear the echo of the sound from the wall? A 0.18 s B 0.36 s C 2.8 s D 5.5 s

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2024

18 Seismic waves from the epicentre of an earthquake take 100 s to reach a point 300 km away. When they arrive, they cause the ground to vibrate with a frequency of 2.0 Hz. What is the wavelength of these seismic waves? A 0.67 km B 1.5 km C 3.0 km D 6.0 km

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2024

23 A man stands 110 m from a high wall. He makes a short, sharp sound and then hears an echo from the wall. The speed of sound in air is 330 m / s. How long after making the sound does the man hear the echo? A 0.33 s B 0.67 s C 1.5 s D 3.0 s

1 marks

Answer: B

This question in 0625/23 Oct/Nov 2024

20 Which statement about ultrasound is correct? A It has a higher frequency than audible sound and it is a longitudinal wave. B It has a higher frequency than audible sound and it is a transverse wave. C It has a lower frequency than audible sound and it is a longitudinal wave. D It has a lower frequency than audible sound and it is a transverse wave.

1 marks

Answer: A

This question in 0625/22 Feb/March 2025

23 A sound wave travels through the air and strikes a solid block of steel. Some of the sound is reflected from the steel, and some is transmitted through the steel. How does the speed and the wavelength of the sound in steel compare to the speed and the wavelength of the sound in air? speed in steel wavelength in steel A less than in air less than in air B less than in air greater than in air C greater than in air less than in air D greater than in air greater than in air

1 marks

Answer: D

This question in 0625/21 May/June 2025

24 A ship sends an ultrasound pulse to the seabed to measure the depth of the sea. The speed of ultrasound waves in sea water is 1500 m / s. The pulse takes 4.6 seconds to travel to the seabed and back to the ship. What is the depth of the sea? A 330 m B 650 m C 3500 m D 6900 m

1 marks

Answer: C

This question in 0625/22 May/June 2025

25 A dolphin has a range of audible frequencies of 150 Hz–150 kHz. Which range of frequencies can be heard both by humans with good hearing and by dolphins? A 20 Hz–150 Hz B 20 Hz–150 kHz C 20 kHz–150 kHz D 150 Hz–20 kHz

1 marks

Answer: D

This question in 0625/22 May/June 2025

22 A student makes a sound in front of a large wall. She hears an echo at time t after making the sound. The speed of sound in air is v. Which expression is used to calculate the distance between the student and the wall? A v  t B v  t C (v  t )  2 D (v  t )  2

1 marks

Answer: C

This question in 0625/23 May/June 2025

23 What is a compression? A a point in a longitudinal wave where the particles of the medium are close together B a point in a longitudinal wave where the particles of the medium are far apart C a point in a transverse wave where the particles of the medium are close together D a point in a transverse wave where the particles of the medium are far apart

1 marks

Answer: A

This question in 0625/23 May/June 2025

23 A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which row describes the amplitude and the frequency of the sound? amplitude frequency A constant constant B constant varying C varying constant D varying varying

1 marks

Answer: B

This question in 0625/21 Oct/Nov 2025

18 Which statement is correct? A Seismic S-waves are longitudinal. B Sound waves are longitudinal. C The amplitude is always greater than the wavelength in a longitudinal wave. D The vibration is at right-angles to the direction of propagation in a longitudinal wave.

1 marks

Answer: B

This question in 0625/22 Oct/Nov 2025

23 Sound travels through air as a series of compressions and rarefactions. Which statement correctly compares a compression with a rarefaction? A In a compression, the wavelength is longer than in a rarefaction. B In a compression, the wavelength is shorter than in a rarefaction. C In a compression, the density of the air is greater than in a rarefaction. D In a compression, the density of the air is lower than in a rarefaction.

1 marks

Answer: C

This question in 0625/22 Oct/Nov 2025

23 Both the amplitude and the frequency of a sound wave decrease. What happens to the sound that is heard? A The sound is louder and has a higher pitch. B The sound is louder and has a lower pitch. C The sound is quieter and has a higher pitch. D The sound is quieter and has a lower pitch.

1 marks

Answer: D

This question in 0625/23 Oct/Nov 2025