The speed of sound wave in a medium depends uponI. mass of the mediumII. density of the mediumIII. elasticity of the medium
Correct answer: D. II and III.
- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation
The speed of sound in a medium is influenced by both the density and elasticity of the medium. Elasticity refers to how well the medium can return to its original shape after being deformed, which directly affects the speed at which sound waves can travel through it. Density affects how closely packed the particles in the medium are, impacting how the wave propagates. Thus, the correct answer is II and III. Mass alone, without considering how it is distributed (density), does not determine sound speed, making options I only and I and II incorrect. Option III only is incorrect because density must also be considered.
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About Speed of Sound
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
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