In which one among the following is the speed of sound maximum?

1. Air at 0°C
2. Air at 100°C
3. Water
4. Wood

Explanation

• The speed of sound depends on the elasticity and density of the medium. In general, sound travels slowest in gases, faster in liquids, and fastest in solids because the particles in solids are closely packed and can transmit vibrations more efficiently. The speed of sound is about 331 m/s in air at 0°C, 387 m/s in air at 100°C, 1500 m/s in water, and several thousand metres per second in wood. Therefore, among the given options, the speed of sound is maximum in wood.

Answer: (d) Wood