Link to our latest notes and resources: https://drive.google.com/drive/u/2/folders/15Ld6KabsL9x9X-t4GefBgSzXFDckJFa6 3.4 Sound 1 Describe the production of sound by vibrating sources 2 Describe the longitudinal nature of sound waves and describe compressions and rarefactions 3 State the approximate range of frequencies audible to humans as 20Hz to 20000Hz 4 Explain why sound waves cannot travel in a vacuum and describe an experiment to demonstrate this 5 Describe how changes in amplitude and frequency affect the loudness and pitch of sound waves 6 Describe how different sound sources produce sound waves with different qualities (timbres), as shown by the shape of the traces on an oscilloscope 7 Describe an echo as the reflection of sound waves 8 Describe simple experiments to show the reflection of sound waves 9 Describe a method involving a measurement of distance and time for determining the speed of sound in air 10 Know that the speed of sound in air is approximately 330–350m/s 11

Josephina🇳🇦Jul 4, 2026

😂😂mol sndala 😉😉Jul 4, 2026

Lolo MusJul 4, 2026

Arf YldrımJul 4, 2026

Asif PatelJul 4, 2026

O Level Sound

Mungkin Anda Juga Suka

Grade 3 English

Grade 4 English

Grade 5 English

Grade 1 Math

Grade 4 Math

Grade 5 Math

Grade 2 Math

Grade 4 General Science

Grade 1 General Science

Grade 2 General Science

O LEVELS MATHS

10th Class Biology Chapter 14 - Class 10 Biology Chapter 5 Reproduction - Biology Class 10 Chapter 14

Computer Science Class 9 Federal Board 2025 | National Book Foundation

11th Class Biology Chapter 3 - 1st Year Biology Chapter 3 Enzymes - FSc Part 1 Biology Chapter 3

Differentiation (Add Maths)

Class 9 Islamiyat Sindh Board

Partial Fractions

FBISE Maths

SNC 2020 Islamiyat || 1 ||

Handwriting and Presentation

Grade 5 Urdu

9th Class Biology Chapter 10 - New book 2025

Class 10 KPK Biology Textbook

Informative Videos

Pilihan Unggulan

Gamixo

VSKIT Drama