If the speed of sound and wind are 345 m/s and 30 m/s respectively and is in opposite direction what sound speed is received by the listener:
Correct answer: B. 315 m/s
- A. 332 m/s
- B. 315 m/s
- C. 340 m/s
- D. 300 m/s
Explanation
When the wind is blowing in the opposite direction to the sound, it can affect the speed at which the sound waves reach the listener. In this case, if the speed of sound is 345 m/s and the wind is blowing at 30 m/s, the effective speed of sound received by the listener would be 315 m/s. The wind acts as a factor that alters the perceived speed of the sound.
This question appeared on the KMU Centralized Admission Test 2020 paper, which you can sit online with every answer explained.
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About Speed of Sound
The speed of sound depends on the properties of the medium, including its elasticity and density, and in gases it varies mainly with temperature. Questions connect speed with frequency and wavelength, compare sound in solids, liquids and gases, and distinguish the speed of propagation from the oscillating particles' motion.
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