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Chapter 12: Sound
Class 9 • CBSE 2025-26
Chapter 12: Sound - Class 9 Science
Step-by-step NCERT solutions for Chapter 12: Sound.
Chapter 12: Sound
Q1.
What is the speed of sound in air at room temperature?
Solution
Approximately 343 m/s at 20°C
Q2.
What is the relationship between frequency, wavelength, and speed of sound?
Solution
v = fλ
Speed = Frequency × Wavelength
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