The speed of sound depends on the medium through which it travels. In dry air at 20°C it is about 343 meters per second. It moves faster in solids and liquids than in gases because particles are closer together. Temperature pressure and density also affect its speed and behavior.
Chapter 13 of Class 11 Physics covers oscillations for the CBSE Exam 2024-25. It explains periodic motion simple harmonic motion and important terms like amplitude time period and frequency. The chapter discusses energy in SHM damped and forced oscillations and resonance. It also includes equations of motion and practical applications in daily life and engineering.
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Speed of sound depends on the density and elasticity of the medium. It can be defined using the formula:
v = √(B/ρ)
Where,
– B is the bulk modulus, which is nothing but elasticity of the medium.
– ρ is the density of the medium.
Since the bulk modulus in solids is way more than that of gases and liquids, sound will travel fastest in a solid. Out of the above options, steel has the highest elasticity: so, the speed of sound is maximum in steel.
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