Sound travels faster in

Question

Accepted Answer

The correct option is 4: Wood

Sound transmission depends fundamentally on the medium's density and elasticity (how quickly particles return to their original position). As a general rule, sound travels fastest in solids, slower in liquids, and slowest in gases. Wood is a solid, and because its particles are packed tightly together and are rigidly connected, vibrations can be transferred much more efficiently and quickly from one particle to the next compared to liquids or gases. This high level of particle proximity and strong intermolecular forces explains why the speed of sound is typically highest in dense, elastic solids like wood (around 3,300 to 4,000 meters per second, depending on the type).

The incorrect option is 1: Vacuum.
A vacuum is a space devoid of matter. Since sound waves are mechanical waves that require particles to vibrate and propagate, sound cannot travel in a vacuum at all.

The incorrect option is 2: Water.
Water is a liquid, and while sound travels much faster in water (approximately 1,480 m/s) than in air, its particles are not as closely packed or rigidly connected as those in a solid like wood, making it a slower medium than wood.

The incorrect option is 3: Air.
Air is a gas, and its particles are far apart. This distance means it takes a relatively longer time for vibrations to be passed from one molecule to the next, resulting in the slowest speed of sound among the given material options (approximately 343 m/s at room temperature).