Sound — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

34 A sports field is next to a large school building. A student at the far side of the sports field sees a groundsman hit a pole with a hammer. school building student hammer pole about 400 m After the hammer hits the pole, the student hears two bangs. Why does the student hear two bangs? first bang caused by second bang caused by A sound of hammer hitting pole sound of pole hitting hammer B sound reaching the student’s left ear sound reaching the student’s right ear C sound reaching student directly sound reflected back from school building D sound reflected back from school building sound reaching student directly

1 marks

Answer: C

This question in 0973/11 May/June 2019

35 A person stands 80 m from a high wall and claps his hands. He hears an echo 0.50 s later. Using this information, how is the speed of sound in air calculated? ( 0.50 × 2 ) A m / s 80 B 0.50 m / s ( 80 × 2 ) ( 80 × 2 ) C m / s 0.50 80 D m / s 0.50

1 marks

Answer: C

This question in 0973/11 May/June 2020

34 A worker in a quarry stands 0.90 km away from an explosion. She sees the explosion 3.0 s before she hears the sound of the explosion. Using this information, what value can be determined for the speed of sound? A 300 m / s B 600 m / s C 2700 m / s D 5400 m / s

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2020

35 Sound from a loudspeaker at P travels directly to Q. Sound also reaches Q after being reflected from a wall at R. loudspeaker wall P 8 m 10 m R 8 m Q The speed of sound is 330 m / s. What is the difference in time for sound to travel from P to Q by the two routes?  6   16  A   s B   s C (6  330) s D (16  330) s  330   330 

1 marks

Answer: A

This question in 0973/11 May/June 2021

35 Sound from a loudspeaker at P travels directly to Q. Sound also reaches Q after being reflected from a wall at R. loudspeaker wall P 8 m 10 m R 8 m Q The speed of sound is 330 m / s. What is the difference in time for sound to travel from P to Q by the two routes?  6   16  A   s B   s C (6  330) s D (16  330) s  330   330 

1 marks

Answer: A

This question in 0973/12 May/June 2021

35 Which statement about sound is correct? A An echo is produced by refraction of sound waves. B The amplitude of a sound wave affects the pitch of a sound. C The approximate range of audible frequencies for a human is 20 Hz–20 kHz. D Sound waves travel more quickly in a vacuum than in air.

1 marks

Answer: C

This question in 0973/11 May/June 2022

35 Two students conduct an experiment to determine the speed of sound in air. They stand 639 m apart. One student hits two blocks of wood together while the other uses a stop-watch to time how long it takes for the sound to reach him. It takes 1.80 s for the sound to reach the second student. What is the speed of sound in air, calculated using these results? A 330 m / s B 355 m / s C 710 m / s D 1150 m / s

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2022

34 A man stands 420 m away from a high wall. He bangs a drum once and starts a stop-watch at the same time. When he hears an echo from the wall, the stop-watch reads 2.4 s. What is the speed of sound, calculated from this information? A 87.5 m / s B 175 m / s C 330 m / s D 350 m / s

1 marks

Answer: D

This question in 0973/11 May/June 2023

35 Which change to a sound wave makes the sound louder? A decreasing the amplitude B decreasing the wavelength C increasing the amplitude D increasing the wavelength

1 marks

Answer: C

This question in 0973/11 Oct/Nov 2023

35 An electric bell is suspended by a rubber band in a glass jar. The hammer hits the bell and makes it ring. rubber band hammer bell jar to pump A pump removes air from the jar. The hammer still hits the bell but no sound can be heard. Why does this happen? A A medium is needed to transmit sound waves. B The bell cannot vibrate in a vacuum. C The pitch of the sound is now outside the range of human hearing. D There cannot be an electric current in a vacuum.

1 marks

Answer: A

This question in 0973/11 May/June 2024

34 The diagrams represent two different sound waves, P and Q, drawn to the same scale. wave P displacement time wave Q displacement time How do the loudness and the pitch of the sounds compare? higher- louder pitched sound sound A P P B P Q C Q P D Q Q

1 marks

Answer: D

This question in 0973/12 May/June 2024

35 The table shows the highest frequency of sound heard by different animals. highest frequency animal heard / kHz bat 200 bird 10 cat 79 The highest frequency sound that a healthy human ear can hear is f. Which animals cannot hear sound of frequency f ? A a bird only B a bird and a cat only C a bat, a bird and a cat D none of the animals in the table

1 marks

Answer: A

This question in 0973/12 May/June 2025

35 The diagram shows a loudspeaker. The cone of the loudspeaker vibrates backwards and forwards in the direction of the arrows. These vibrations produce a sound wave in the air. cone of loudspeaker Which change results in the loudspeaker producing sound with a higher pitch? A increasing the distance moved by the cone during each vibration B increasing the time taken for each vibration C decreasing the distance moved by the cone during each vibration D decreasing the time taken for each vibration

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2025