Multiple choice

The speed of sound in air is ______.

  1. 340 m per second

  2. 2 x 108 m per second

  3. 20 m per second

  4. none of these

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

At standard temperature (20°C) and pressure, sound travels through air at approximately 340-343 meters per second. This value varies with temperature (speed increases with temperature) but 340 m/s is the standard approximation used in textbooks and calculations.