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Which one of the following statements about the speed of sound waves is not correct?

Options

  1. AThe speed of sound waves in steel is higher than that in water.
  2. BThe speed of sound waves in air decreases with increase in temperature.
  3. CThe speed of sound waves in air increases with increase in temperature.
  4. DThe speed of sound waves in water is higher than that in air.

Correct answer

B. The speed of sound waves in air decreases with increase in temperature.

Step-by-step solution

The speed of sound is directly proportional to the temperature. Therefore, as the temperature increases, the speed of sound increases. The speed of the sound also depends on the density of the medium through which it travels. In general, sound travels faster in liquids (like water) than in gases (like air) and quicker in solids (like steel) than in liquids.

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