Discussion
What is the sound velocity in the air at 0°C ?
Answer: B
The speed of sound in air at 0 °C is 331 m/s.
In dry air at 0 °C sound travels at about 331 m/s, increasing by about 0.6 m/s for each degree rise in temperature, so it is about 343 m/s at 20 °C.
The other values belong to other media: about 1,270 m/s is the speed in hydrogen gas, about 1,400 to 1,500 m/s in water, and around 5,000 m/s or more in metals such as iron.
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