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klimatos
#13
Nov6-11, 01:57 PM
P: 417
Quote Quote by Philip Wood View Post
After all, the individual molecules do carry the sound as small superimposed velocities.
At 25C, the average dry air molecule will change its speed and its direction of movement some five billion times a second. It is impossible for any individual molecule to carry any sort of meaningful signal. Instead, sound waves involve collections of molecules whose mean direction of movement and speed carry the signal. With some 1025 molecules per cubic meter at NTP, there are more than enough collections to go around.