Multiple choice

The velocity of sound is affected by change in

  1. temperature

  2. medium

  3. pressure

  4. both (1) and (2)

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sound velocity increases with temperature (about 0.6 m/s per degree Celsius in air) and varies with the medium - fastest in solids, slower in liquids, slowest in gases. The density and elastic properties of the medium determine sound speed, while temperature affects particle vibration energy.