Question

spped of sound in atmosphere???​

Answer 1

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The term is commonly used to refer specifically to the speed of sound in air. At sea level, at a temperature of 21 degrees Celsius (70 degrees Fahrenheit) and under normal atmospheric conditions, the speed of sound is 344 m/s (1238 km/h or 770 mph).

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Answer 2

speed of sound in atmosphere???

Speed of sound depends upon many factors :

1) State of matter,

2) Humidity

3) Temperature

4) Presence of other obstacles.

So generally speed of sound in atmosphere is 343 m/s.
(in normal temperature and pressure)