Physics (9-1) - 0972 CIE

Sound

Muhtasari

Pluck a guitar string, hit a drum or speak, and something vibrates. That vibration pushes on the air, and a wave of squeezes and stretches travels outward until it reaches your ear. Sound is a wave you can hear, but only within a certain range of frequencies and only when there is material for it to travel through.

In this topic you will describe how sound is produced by vibrating sources, learn that sound is a longitudinal wave made of compressions and rarefactions, and meet the range of frequencies humans can hear. You will also learn why sound needs a medium, how fast it travels in air, and why it travels faster in solids than in liquids or gases.

Malengo

Describe the production of sound by vibrating sources
Describe the longitudinal nature of sound waves
State the approximate range of frequencies audible to humans as 20 Hz to 20 000 Hz
Know that a medium is needed to transmit sound waves
Know that the speed of sound in air is approximately 330-350 m / s
[Supplement] Describe compression and rarefaction
[Supplement] Know that, in general, sound travels faster in solids than in liquids and faster in liquids than in gases

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Maelezo ya Somo

Sound underlies speech, music, sonar, ultrasound scans and noise control. Understanding that it is a longitudinal wave that needs a medium explains why there is silence in space and why you hear an approaching train through the rail before the air. Exam questions test the production, nature, speed and audible range of sound.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Sound. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

A sound wave is best described as: A. a transverse wave B. a longitudinal wave C. an electromagnetic wave D. a stationary wave Answer: B
The approximate range of frequencies audible to humans is: A. 2 Hz to 2000 Hz B. 20 Hz to 20 000 Hz C. 200 Hz to 200 000 Hz D. 0 Hz to 100 Hz Answer: B
Sound travels fastest in: A. a gas B. a liquid C. a solid D. a vacuum Answer: C
An echo returns from a wall 510 m away in 3.0 s. The speed of sound is: A. 170 m/s B. 340 m/s C. 1530 m/s D. 255 m/s Answer: B
A region of a sound wave where particles are pushed together is a: A. rarefaction B. crest C. compression D. trough Answer: C

Fanyia kazi maswali haya kwenye programu

Vitabu Vinavyopendekezwa

Cambridge IGCSE Physics Coursebook

Manukuu: Third edition

Mchapishaji: Cambridge University Press

Mwaka: 2021

ISBN: 978-1-108-88807-3

Maelezo: Endorsed coursebook with full coverage of the 0625/0972 syllabus, worked examples and practical skills.

Cambridge IGCSE Physics

Manukuu: Third edition

Mchapishaji: Hodder Education

Mwaka: 2014

ISBN: 978-1-4441-7642-1

Maelezo: Endorsed textbook covering the Core and Supplement content with worked examples and questions.

Jifunze zaidi kutoka vyanzo huria

Sehemu ya kitabu Speed of Sound, Frequency, and Wavelength OpenStax · Physics
Relate the characteristics of waves to properties of sound waves

"Physics: Speed of Sound, Frequency, and Wavelength" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/14-1-speed-of-sound-frequency-and-wavelength. Access for free at https://openstax.org/books/physics/pages/1-introduction
Sehemu ya kitabu Sound Intensity and Sound Level OpenStax · Physics
Relate amplitude of a wave to loudness and energy of a sound wave

"Physics: Sound Intensity and Sound Level" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/14-2-sound-intensity-and-sound-level. Access for free at https://openstax.org/books/physics/pages/1-introduction

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Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Sound? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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Msaidizi wa Gumzo wa Kujifunza wa AI Uliobinafsishwa

Maswali ya mtihani zaidi ya 200,000 ya IGCSE, JAMB, WAEC na NECO

Zaidi ya Madaftari ya Masomo 1200

Msaada Nje ya Mtandao - Jifunze Wakati Wowote, Popote Pale

Ratiba ya Daraja la Kijani

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