The speed of a sound wave in a gas is analogous to the speed of ______________________?
Correct answer: A. An elementary wave in an open channel
- A. An elementary wave in an open channel
- B. Flow in an open channel
- C. A disturbance travelling upstream in moving fluid
- D. None of these
Explanation
The propagation of sound in a gas is a small-amplitude pressure disturbance, analogous to an elementary wave travelling through an open channel. It is not the same as the bulk flow velocity in the channel.
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