The speed of sound in dry air at 20C is about?

A. 343 m/s
B. 230 m/s
C. 130 m/s
D. 430 m/s

Answer

Correct Answer: A. 343 m/s

Detail about MCQs

The speed of sound in dry air at 20°C is approximately 343 meters per second (m/s). This value is affected by factors such as temperature, pressure, and humidity. In dry air at standard conditions, sound travels at this speed, which is commonly used as a reference value in physics and engineering calculations involving sound propagation

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